Regarding the FX bug, it happened to me yesterday with two programs I've created... particularly one where I used the hipass filter on both layers on one program, and then switching to the other introduced this RingMod like sound... from the times I've experienced it, it always seems to happen when layer A & B have the same FX going... sometimes it screws up the program it's used in, at other times it works with that program, but makes other programs sound weird when switching to them... I'll do some more experimentation with this today and post it if I find anything reproducible.