It's not a fit problem, It's a pivot spot on your hand created by the balls movement in your swing and release. I think it happens more with guys who spin the ball a lot.
Looks like the simplest fix is to wear a glove. How many games did you bowl before it happened?
Heres a forum thread talking about it.
http://forum.bowlingchat.net/viewtopic.php?f=13&t=4796
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