Actually, the contact list is not updating, even though the ContactSyncTime field in the CuteChatUser table shows an updated time.
For instance... if I'm User1. I am logged out. My last ContactSyncTime was 10:00am.
A new User2 registers and is automatically added to my contact list (in the CuteChatRelation table).
I sign back in ten minutes later. My ContactSyncTime now changes to 10:10am. However, User2 does not show up in my contacts list yet in the messenger, even though they are a FRIEND in the CuteChatRelation table.