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

I just got a XL-7 and immediately upgraded to 1.18.  I am having 
problems when I have the XL-7 synced to Cubase and I want to jump 
into grid record mode (hold play then hit record).  The XL-7 will 
only allow me to record with the preset from the track I originally 
had selected.  So for instance I start with track 9 for bass and I 
then change to track 1 for kick, it will only record more bass notes 
even though the pads are playing the kick when I hit them.  It gets 
worse ....
I hit stop on Cubase then RTZ the XL-7.  Then I go back into grid 
record on the XL-7 without starting Cubase.  I have the same 
problem ... it is still recording bass notes even though I have 
selected track 01A for kick.  Changing pattern and recording from 
there does not fix it.  I have to reboot the XL-7 then everything is 
OK ... until I sync to Cubase again of course.  Is this a MIDI issue 
or a horrible bug?
Second problem ... when in step record ... how to I go back a step?  
I know I can go forward by hitting Play but ...
And lastly ... in realtime record, what is the easiest way to delete 
or overwrite a bum note when recording in a loop?
Thanks for your help,
Justin.