[RogerPease]

Kind of a long shot:
According to K&K the wires from the discs to the endpin jack must not contact the interior of
the guitar. Normally the wires are twisted to take up any slack and keep them suspended.

Is it possible that when installing the Acoustic-lok the wire got untwisted enough to touch somewhere?
Thumping on the bridge could be making them jump around. It would an easy to twist the jack again.
The wire should be under some mild tension.

Look inside again and make sure the wires aren't close to anything.

Hope this helps. _RP