EXS 24 Logic Sampler Users Group

Hi all,
I was very frustrated a few days ago when I loaded a bunch of 
Logic tunes that use various EXS24 instruments, only to find that 
some of the songs did not recall the correct instruments.  For 
example, a flute had become a gong, a string section had 
become an organ.  Some songs (perhaps even most) recalled 
just fine.  Why is Logic behaving inconsistenly with this?  It's 
going to be a bit of a struggle to remember which instruments go 
to which midi track.  Can anyone explain it?

Thanks,
David