We have discovered a small bug that prevents the Automatch option in 2 Player GameCenter Match Up from working correctly.
This affects Bulls i and Bulls i HD.
This bug has been fixed and submitted to Apple. We expect the new update Version 1.3.1 to be approved within the next 7-10 days.
Friend to Friend games still work correctly so you will be able to play against your GameCenter buddies online.
The Touch Mechanics