There is no need for choosing objects when creating collections. Because after creating a user or device collection on microsoft system center configuration manager 2012 there would be objects that is created newly on your network infrastructure.
When SCCM 2012 is integrated with remote WSUS 3.0 SP2 server, synchronization problems occured. In the wsyncmgr log file there are some logs about the problem. Log files are under Program Files\Microsoft Configuration Manager\Logs folder.
Performing sync on retry schedule $$<SMS_WSUS_SYNC_MANAGER><05-10-2012 14:10:05.829-180><thread=3452 (0xD7C)>