Hy Clyde,
I think it's standard procedure for them to do a follow-up turbt afterward. With this turbt, they typically look really closely at the area and sample anything remaining that looks suspicious. They also clean up the margins of the previous surgery. For me, there was a 6 week period between the 2 turbts - This gives it time to heal a bit, and for the swelling to decrease. It also allows some time for pathology of the biopsies.
The last time I had a cystoscopy (less than 2 weeks ago), my urologist took a couple biopsies. The sampling equipment looks like small alligator jaws, and I was able to watch on the monitor while the biopsies were taken. Subsequently, the areas were cauterized to prevent further bleeding. The whole thing was relatively painless, and I recommend it (as opposed to the complications of a turbt). Maybe they could do this for you, since there's not really been a formal diagnosis of CIS.
Mike