I think what it means, relative to the OP claim, is that the TSA stepped up its game and is now reporting the guns it itself is trying to smuggle past itself as

I think what it means, relative to the OP claim, is that the TSA stepped up its game and is now reporting the guns it itself is trying to smuggle past itself as the subject guns that are being detected at airports. If you know how the government works, that is the only plausible explanation.