I have a Gem that had the same problem.  But the problem is not the
position of the repeat key, but rather the position of the offset
(drive) pin that engages the left end of the cob.  The arm with the
pin is crimped to the shaft but can slip.

I fixed the problem by twisting the arm clockwise or counter clockwise
which ever requires the least amount of turn.  This starts the Cob in
a different rotational position in relation to the "Reset Pin"

Regards
Marvin Polan