i mistakenly recorded the auto accompaniment (channels 9-16) part of my midi performance to one midi track 

can sonar x2a create separate tracks based on the midi channel from that one track

if so how

There is a "Split Channel to Tracks" cal script, you might find useful. The comments at the top of the script:
;
; Split Channel to Tracks.cal
;
; This takes the current track and splits it by channel into 16 other tracks.
; It is up to the user to:
; - position the cursor on the desired track to be split
; - make sure only that track is selected
; - set From and Thru to cover whatever portion of it they wish split

worked great 
thanks