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

Lately I've been writing the basics of my patterns on the XL-7, and then I 
use E-Loader to get the pattern data into my computer.  From there it gets 
imported into Cubase 5.1 so I can fine tune things and draw the rest of it 
in on the large screen.  I set it so that my L and R locators are on each 
end of the pattern data, and then set it to loop 8 measures (the length of 
the pattern).  But everytime it loops back to the beginning of the 
pattern, playback stutters a bit, and it takes about 2 or 3 beats until it 
gets synced up again.  I've tried a bunch of setting in cubase, and I've 
never had this problem before with it working this way with other gear, so 
I dno't think it's Cubase, but rather the XL-7.  Is it just getting too 
much data at the beginning of the pattern?  I never have any glitching 
when I switch patterns on the fly with just the XL-7, so that seems weird. 
 Also, in Cubase I can mute all but a couple tracks, and I still get the 
stuttering, so I don't think it's a MIDI bandwidth issue either.  What 
exactly is being transmitted at the beginning of the pattern each time? Is 
there sysex there, or is this part of that Tick 0 and Tick 1 issue? Anyone 
else seen this?  Ideas? 

I use the MIDI port on my Echo Layla24 BTW, if that matters at all.
rEalm