What steps will reproduce the problem?
1. Use GenerateMyLibrary.py to generate my library.
2. Some .mp3 files report incorrect length.

Please provide any additional information below.

There are some short n' sweet fanfares I want to play for quest completion, level up, battle victory - things like that.  I noticed that some of them play several times over.  After closer inspection, I noticed the reason was not any applicable setting, but rather Soundtrack appears to be reporting some files with lengths up to seven times longer than they actually are.  Instead of playing the track once and being silent for however much longer it thinks it's supposed to play, it plays the track repeatedly until the false duration reaches its end.

That is, in Python, it reports a track's length that should be around 5 seconds as up to over 60 seconds; in the GUI, it reports this same length, and when playing the track, the progress bar for the track plays its full length, but repeats the 5-second clip for as long as it takes to reach the end of the false duration.