Contacts duplicate in spotlight search

Hi there, I googled for this but it seems that I didn't find anything.

I got a Mobile Me account and my 3GS iPhone is synced with that, on iTunes contacts syncing is turned off and I got only one record for each one in Contacts, so it's ok here, but when I search for a contact on iPhone spotlight it finds two record for each of the person I'm searching for, the same records: one has got the contact icon on the left, the other not.

I tried stopping mobile me syncing, I synced then with iTunes (contacts sync still off), the contacts has been deleted then I tried searching on spotlight and it could still find the records!!! I waited for about ten minutes but nothing happened.

I restored mobile me syncing, contacts reappeared and the problem with duplicate contacts in spotlight is always there.

Any suggestion?

Thanx
Fabrizio