When appealing post #6591009, I managed to appeal it twice. I am not sure if there were adverse effects from the Approver perspective but, as a Member, the appeals occupied six upload slots.
If this bug is worth pursuing, let me know if additional information would be useful. In case this is relevant, I usually appeal using DuckDuckGo (iOS, so effectively Safari) and oftentimes get an "already appealed" error message regardless of the actual outcome of the appeal attempt.