Panny GT30 and MKV: why?

Hi everybody,
first of all thank you Serviio!
Now my pain: the MKV on my Panny GT30
Really i don't understand why some mkv are managed natively from my Panny and others are transcoded through Serviio.
Obviously Serviio isn't the problem but the solution, in any cases i don't understand what are the parameters into mkv file that create the problem in my Panny.
Please below you can find the report from MediaInfo application about the MKV properties, the first report is a MKV natively read from my TV, the second report is about a MKV that the Serviio transcode. The question is WHY? Which are the differences?
Anyone can help me?
thx
Freeman
***********************************************FIRST REPORT
General
Unique ID : 194867440791330774852542818890875439358 (0x929A1A9BDA1DD7A2AC1B1B2E529088FE)
Complete name : C:\Users\xxxxxxxxxx\Videos\Il nome della Rosa\Il Nome della Rosa.mkv
Format : Matroska
Format version : Version 2
File size : 7.95 GiB
Duration : 2h 6mn
Overall bit rate : 9 025 Kbps
Encoded date : UTC 2010-09-18 07:26:38
Writing application : mkvmerge v3.4.0 ('Rapunzel') built on May 15 2010 09:38:20
Writing library : libebml v0.8.0 + libmatroska v0.9.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 6mn
Bit rate : 8 458 Kbps
Width : 1 920 pixels
Height : 1 036 pixels
Display aspect ratio : 1.853
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.170
Stream size : 7.28 GiB (92%)
Writing library : x264 core 104 r1713 c276662
Encoding settings : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=18 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=5 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=8458 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 2h 6mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 24ms
Stream size : 173 MiB (2%)
Title : italiano dd 2.0
Language : Italian
Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 2h 6mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 24ms
Stream size : 346 MiB (4%)
Title : inglese dd 5.1
Text #1
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : italiano
Language : Italian
Text #2
ID : 5
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : inglese
Language : English
Menu
00:00:00.000 : en:Chapter 1
00:02:42.760 : en:Chapter 2
00:05:58.600 : en:Chapter 3
00:10:14.680 : en:Chapter 4
00:14:32.000 : en:Chapter 5
00:18:26.080 : en:Chapter 6
00:21:16.480 : en:Chapter 7
00:24:46.160 : en:Chapter 8
00:29:55.600 : en:Chapter 9
00:36:09.440 : en:Chapter 10
00:40:49.560 : en:Chapter 11
00:46:54.720 : en:Chapter 12
00:50:03.400 : en:Chapter 13
00:52:50.720 : en:Chapter 14
00:55:18.840 : en:Chapter 15
00:58:38.520 : en:Chapter 16
01:03:21.560 : en:Chapter 17
01:07:26.520 : en:Chapter 18
01:11:42.160 : en:Chapter 19
01:15:17.920 : en:Chapter 20
01:19:34.160 : en:Chapter 21
01:23:17.280 : en:Chapter 22
01:26:51.760 : en:Chapter 23
01:31:09.360 : en:Chapter 24
01:34:12.640 : en:Chapter 25
01:37:38.520 : en:Chapter 26
01:42:29.840 : en:Chapter 27
01:45:20.000 : en:Chapter 28
01:49:33.120 : en:Chapter 29
01:52:31.080 : en:Chapter 30
01:56:11.000 : en:Chapter 31
01:58:01.600 : en:Chapter 32
02:02:50.520 : en:Chapter 33
***********************************************SECOND REPORT
first of all thank you Serviio!

Now my pain: the MKV on my Panny GT30

Obviously Serviio isn't the problem but the solution, in any cases i don't understand what are the parameters into mkv file that create the problem in my Panny.
Please below you can find the report from MediaInfo application about the MKV properties, the first report is a MKV natively read from my TV, the second report is about a MKV that the Serviio transcode. The question is WHY? Which are the differences?
Anyone can help me?
thx
Freeman
***********************************************FIRST REPORT

General
Unique ID : 194867440791330774852542818890875439358 (0x929A1A9BDA1DD7A2AC1B1B2E529088FE)
Complete name : C:\Users\xxxxxxxxxx\Videos\Il nome della Rosa\Il Nome della Rosa.mkv
Format : Matroska
Format version : Version 2
File size : 7.95 GiB
Duration : 2h 6mn
Overall bit rate : 9 025 Kbps
Encoded date : UTC 2010-09-18 07:26:38
Writing application : mkvmerge v3.4.0 ('Rapunzel') built on May 15 2010 09:38:20
Writing library : libebml v0.8.0 + libmatroska v0.9.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 6mn
Bit rate : 8 458 Kbps
Width : 1 920 pixels
Height : 1 036 pixels
Display aspect ratio : 1.853
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.170
Stream size : 7.28 GiB (92%)
Writing library : x264 core 104 r1713 c276662
Encoding settings : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=18 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=5 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=8458 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 2h 6mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 24ms
Stream size : 173 MiB (2%)
Title : italiano dd 2.0
Language : Italian
Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 2h 6mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 24ms
Stream size : 346 MiB (4%)
Title : inglese dd 5.1
Text #1
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : italiano
Language : Italian
Text #2
ID : 5
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : inglese
Language : English
Menu
00:00:00.000 : en:Chapter 1
00:02:42.760 : en:Chapter 2
00:05:58.600 : en:Chapter 3
00:10:14.680 : en:Chapter 4
00:14:32.000 : en:Chapter 5
00:18:26.080 : en:Chapter 6
00:21:16.480 : en:Chapter 7
00:24:46.160 : en:Chapter 8
00:29:55.600 : en:Chapter 9
00:36:09.440 : en:Chapter 10
00:40:49.560 : en:Chapter 11
00:46:54.720 : en:Chapter 12
00:50:03.400 : en:Chapter 13
00:52:50.720 : en:Chapter 14
00:55:18.840 : en:Chapter 15
00:58:38.520 : en:Chapter 16
01:03:21.560 : en:Chapter 17
01:07:26.520 : en:Chapter 18
01:11:42.160 : en:Chapter 19
01:15:17.920 : en:Chapter 20
01:19:34.160 : en:Chapter 21
01:23:17.280 : en:Chapter 22
01:26:51.760 : en:Chapter 23
01:31:09.360 : en:Chapter 24
01:34:12.640 : en:Chapter 25
01:37:38.520 : en:Chapter 26
01:42:29.840 : en:Chapter 27
01:45:20.000 : en:Chapter 28
01:49:33.120 : en:Chapter 29
01:52:31.080 : en:Chapter 30
01:56:11.000 : en:Chapter 31
01:58:01.600 : en:Chapter 32
02:02:50.520 : en:Chapter 33
***********************************************SECOND REPORT
