Parts in stock w/zero balance

I have parts showing up on stock reports and in part tracker in a bin
with a lot number but the qty. is zero. I can't figure out why this
is happening. The $ value is zero. If I adjust a qty of 1 in and
adjust qty 1 out, it is no longer showing in tracker in the bin w/a
zero balance. I print cycle count sheets w/o the qty. and these
parts show up on the report. It is driving my counters crazy.

Does anyone know why this is happening?

Thanks,

Tom Ford
Mid-West Spring