I had a similar issue with the "sync contacts" option on BIS. I deleted and re-added my gmail account through BIS, checked the "sync contacts" box and my contacts were all screwed up. I had lots of duplicates, or middle initials were moved to the beginning of the last name field, addresses were moving around to other contacts, etc.
I realized I had Gmail's Contact Sync running, Tmobile's Contact sync/backup (whatever it's called) running, and now this BIS contact sync. I turned off all of them, deleted all my contacts from Gmail, and restored my contacts from my last DM backup, then turned on the Gmail Contact Sync (via application, not BIS) and now everything is ok again.
Last edited by data1025 : 06-11-2010 at 10:47 AM.