I'm a new user of BiaB 2009.5 and have Real Tracks 11 & 12 loaded, but I have experienced the same problem as you, and am wondering if Real Tracks 33 might be a better option.

I posted a few days ago requesting advice on this, but have had a shortage of answers. I seem to be unable to slow down or get a an appropriate rhythm from Real Tracks to a number of Bluegrass and Old Time fiddle standards.

I'm a fiddler and I want to use BiaB as a "back up band" when practicing.

I also am struggling to find an appropriate acoustic rhythm guitar track for many standard tunes.

Any thoughts?

Harry