Plaxo, HTC 8525 & a Macbook

Well,

I'm losing to something here. I should only have like 200 contacts, and somehow I keep ending up with 400 plus! I have a Cingular (AT&T or HTC) 8525 Windows Mobile phone and a new MacBook using Plaxo and the Missing Sync. I'm trying to figure out how to sync it all up, but somehow I keep ending up with duplicates, triplicates, and quadruplicates. I've gone through and deleted and "de-dup'd" at least five times now...This is getting annoying!