Ahh!! Virus Tweakers Help!!

[grs]

Could be in your tweaking you also turned the 3 soft knobs, that were set up to do things in the matrix page etc. Say you left them at values other than zero when you recall the patch it's going to sound different. Ranging from slightly different to heaps different.
The only way to include these temp soft knob values is to record those tweaks as cc data in your song etc.
Sometimes in patch creation I like the sound of a soft knob set to something other than zero, so i have to set up a matrix data entry value instead of the controller / soft knob assign.