I am able to sync via bluetooth to my MAC with no prob. But I have to reconfigure things if I want to sync it to a second computer. If I go back to the first computer, I have to reconfigure again. Is this par for the course?

Also, when I switch computers between syncs, the treo takes a VERY long time, as though it is syncing for the first time. I've gone back and forth about 5 times now, and it continues to frag on. Suggestions?