Cytology often has false positives. Sounds like your URO is on top of things after "suspicious" finding going to "positive". Good medicine (and none of us are doctors) is usually doing the least invasive treatment until more is needed. Another cytology test I believe is prudent. Heck, I even had a suspicious test with my GP that was sent to mu URO and when I showed up he said, "What am I doing there". It was nothing. That was about 3 years ago.
With you not having BCG I am presuming your prior tumors were low grade? If they were high grade BCG is the normal course for non invasive.
IF the cytology is positive then a cystoscopy would probably be the next test. Let's trust this is nothing. Keep us posted!