[Protocol 2001]

I've had the Z10 now since release day and have been having significant challenges with my contact book. I sent over all my contacts from my 9900 via Bluetooth and that seemed to work well -- although I'm unclear where it stored them all. In the contacts app, it has contacts on the device, from Facebook, from Hotmail, from SIM card. I have the option to enable/disable each of these except the "on device" contacts. I like having them all in one place, and I like the link feature so you don't have multiple entries for the same contact. The issue I'm having however, is that periodically it seems contacts unlink themselves after I've linked them. So I have to go back through my whole contact list and relink contacts. This is very frustrating. I haven't made any changes to my contacts coming in through Facebook, Hotmail, SIM card, or on device -- so I'm really at loss how they become unlinked.

Has anyone else experienced similar problems? Any ideas for a work around?