Honda Civic 1999 brake shoes and wheel cylinder

I believe you are referring to the rear brakes and the drum? I think also that what you are experiencing is the brake system trying to adjust itself. It needs to tighten itself up with the self tighteners. My only concern is that when you put in new brake shoes you should bring the adjustment close and then slip on the drum. I assume they did not do this and are letting the system work the rachet assembly. It should even out.