Emu XL-7 & MP-7 User's Group

Hi there. I am now using the v 1.18 OS in my XL-7.  I still have 
small problems, one of them being the following:
I have a user pattern that does not use all tracks, I change patterns 
to one that uses all tracks, and then I go back to my first pattern, 
the channels (presets) assigned to each track that is not used 
changes to the presets or assignation of the second pattern.  This 
apparently presents no problem, since there are no events in the 
tracks that change their assignation.  Nevertheless, when I build the 
song, the secuencer jumps or lags between each pattern. This is 
because, it has to read the new assignation.  Anyways, I dont find 
that normal. What do you think??