i use the CS600 w/ HRM only also. I haven't had any of the problems mentioned. I'm on the road this week so I'm not in front of the unit and software either. However, if no one has helped you by this weekend I'll go through everything and all my setting when I get home, and see about uploading some screen shots.

We might be able to see whats different by comparing. I'd also suggest calling Polar if that's an option.