I have seen some of this with TTS in my XP system. Not being a sharp midi guy, I have had no idea why these changes reverted back to what looks like a default setting in TTS. If I remember correctly this is a Roland product to begin with and yes Cakewalk is also now there as well but my point is that the Roland development team might have an insight as to why some of this is happening.
The only thing that might make a difference is if an arrangement in TTS is saved as a preset with a name we might link to a song and called(I don't know if this is possible) at the time of playback.
Maybe someone here who is much more well versed in TTS than I could comment. Wyndham