Serviio

I had 3 video files that had acquired very long files names and the first 33 characters of the names were the same. Serviio would only index the first of the files and some of the info Serviio displayed for that file, namely the length, was incorrect, much too long. I solved the problem by renaming all the files with short file names but am wondering if this is known Serviio behavior and are there rules in Serviio that I should know such as how many letters in the file name does Serviio look at when it indexes a file.