You are right. The "wrong" exit node is not figuring on https://check.torproject.org/exit-addresses anymore. But it still visible from https://atlas.torproject.org/. Downtime 4 days 5 hours 21 minutes and 6 seconds Running false How long will it keep figuring on atlas?
Atlas uses onionoo data. Onionoo data shows relays that were running at some point within the last 7 days.