Windows Mobile Device Center and Win Mobile 3.0

Just bought my Vista desktop and attempting to sync my Audiovox SMT5600
(running WM3). I can establish the partnership but when i go into sync
settings for Contacts, Calendar, and Tasks to change them from Exchange to
PC, eventually WMDC crashes (usually after syncing up my contacts) and Manage
Partnership link gets grayed out. I can't do anything until I delete the
Partnership and start all over - with the same results.

Additionally, setting up the sync for the first time combines all my info
from my phone to Outlook (which was already in sync) so I have 2 of
everything. Activesync at least used to ask if i wanted to replace my items
on my phone the first time I connected - Vista just combines everyting.
What's going on?