"I certainly hope my (over)diligence to pay the IRS doesn't cause you any problems"

Who is the "you" for that concern? The tax payer does not have to keep sending checks; the IRS will cash whatever they have, and if that hits a Stop Payment, that just means everyone has to chase their tails to resolve the issue that is clearly already delayed. The goal is to not make things worse, not keep duplicating and triplicating efforts, not to overreact, and just to keep having some patience.