Well Abeber, it seems one issue solved and another issue arised !
How big is your protected paritition/drive ? Did you use CTM to protect your system partition Only ? And approximately how long it took to rollback, more than 20 mins ? How long did 2.8 take to rollback for you ? And finally, how many snapshots have you kept ?
You also should have defragged your system partition before you'd reinstalled CTM ! As I've rollbacked many times with 2.9beta, they all took less than 5 mins without any problems. ( I only protect my 30GB system partition with CTM, and prefer to use other form of back-up for non-system partitions )