COMBI/SEQUENCE- HELP!!!

[macman]

Hi-

when in combi sequence....I am having a real problem with this....I would love some help...

I record a combi sequence in "Sneakin" and save it to play back...then I try to go in and mix the volume levels..but what happens is that all the tracks get adjusted, not just the one I want - I think this is a MIDI issue, or an sysex issue...does anybody know what buttons to press, in order to enable just ONE track to be adjusted when I am overdubbing volume levels in this mode....any help would be awesome !!!

-mark