Ball 1 bounces backward in momentum problem, should it continue forward?

[yopy]

http://img16.imageshack.us/img16/550/asaj.png

For my final answers I got:
Ball 1:< -2 , 0 >
Ball 2:< 6 , 3.46 >
Ball 3:< 6 , -3.46>

With magnitudes of 2 and 6.928 respectively. I feel like I did the problem correct, and the equations work out right, but intuitively I feel that the first ball shouldn't bounce backwards, but instead continue forward.

 

[Carid]

Spend more time at the billiard table. It's very instructive. It's real physics!