Analogue-sequencer

Yesterday something strange happened.....
We were jamming along and all went fine. We programmed some tracks, few 
playlists and one cc but that's about it.
After a five minute brake we pressed play and...
All hell broke loose. A track playing my JD-800 changed pitch all the 
time, the sequence the virus was playing looked like it was grabbing 
some events from somewhere, some parts got muted from time to time....
Kind of nice though after turning up the tempo a bit.
Anyway, after checking I noticed all kinds of aux events were selected, 
in all the parts we created. I didn't check on the ones we didn't use. I 
can't seem to remember me putting those events in there?
I think my P3 got a mind of it's own.

So, what did I do wrong?

I'm going to jam a little more now to see if this is repetitive behavior 
or not ;-)
I erased the bank yesterday (didn't back-up though) and all seemed OK.
Nothing connection to midi In.
Did I mention that I'm a new P3 user and that I still got to read the 
part of the aux events.

Cheers,
Tom