"I doubt if it is hot everywhere."
Translation:Wątpię, czy wszędzie jest gorąco.
There's a report button after you get the answer checked, and it should be used for reporting problems with questions and answers. The creators don't keep track of comments, they may pop in here, but that's not guaranteed.
No, it's only possible just after answering the question and before following to the next one. But maybe someone else notices this comment chain and reports it.