Pin down drills can cause this. As long as it isn't hitting any holes it wouldn't hurt anything..
I believe that you can raise the bow tie with a weight hole down the VAL or in the lower right quandrant.
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16-17 mph,350 rpm,PAP 5 1/2 x 3/8up, HighGame 300 x 3, High Series 782
Book Average 215 / 205,PBA Xperience ave180