I have Shimano XTR M965 shifters and hydraulic brakes on my MTB. The rear brake hose and caliper still seem to have air in them although I rebleeded the brake several times in trying to get all the air out. The rear brake does not squeeze very tight. Every time I squeeze the lever hard to brake while riding, it would shift from the current cog to larger one(s).

Is this normal? What should I try to fix the problem?

Thanks!

Hmmm, I don't know which thread to answer this in - this thread, or this one:
http://www.bikeforums.net/showthread.php?t=104769

I apologize for posting on two forums. After I posted the thread here, I realized the Bicycle Mechanics forum was a more appropriate place for this type of post.