We get a wrong matching question (yes, sometimes it happens), so that correct answer is listed as an additional wrong answer, and incorrect listed as correct. Student make a correct answer and appeal.

I edit the question, typing a correct one in correct place and incorrect in the previous place of a correct answer. But Moodle still report student wrong - it store student's answer by id and now think it is an incorrect one (I've opened question editing in a new window, so I can compare two versions of attempt - students answer on the was different!). Regrading doesn't help

This inconsistency should be dealt with somehow, thought it may not be that easy.