the problem really is that ChatGPT writes things based on what is most likely given what it wrote before and what the input is, so what are the possible error scenarios:

1. making a mistake in this part is really common, ChatGPT makes common mistake.

2. you have uncommon situation affecting here, ChatGPT ignores and writes things that cause you to get in trouble, or it writes things that cause you to pay more than you should.

Also the longer is goes on writing things the more likely that things it writes does not hang together with the past things it wrote, when a human lies they try to make their lies at least follow a sensible pattern. ChatGPT would be likely to get you flagged for audits because you can't be sure that what it wrote on page 1 jibes with what it writes on page 3.

Not if there are race conditions.