iCloud does not "sync" data like MobileMe did. Your computer & devices subscribes to the master data stored on the iCloud servers.
Your signature states you are using OS X 10.6.1 - iCloud requires OS X 10.7.5 or later
If you are using the correct version of OS X, turn iCloud off, then re-import your Address Book backup, then turn iCloud Contacts back on. The data stored in Address Book should be transferred to iCloud and your local Address Book setup to subscribe to the data on the iCloud server.
Thanx for your reply
I have version 10.8.2. I cleaned all my contacts on my devices (ipad, iphone, laptop and icloud) Synct everything
that everything is completely empty. Put iCloud of, fresh contacts in...
And then without ICloud on adressbook starts to "sync" 1600 adresses schrinks back to 67..
So something is mysteriously syncing with some kind off database..
What to do?