I don’t know why someone did this, but 3 old achievements for The Emerald Nightmare, The Nighthold, and Tomb of Sargeras are popping up today after the 11.1.7 patches, losing the original time stamp of when the achievement was actually completed on. There goes another 2016 recorded listing.
If you log out and log back in, the old time will be back on.
When i first logged, the time was shown as today, but after i log out and went on my alt and do a dungeon, and log back on priest, the original time came back.
It’s worse for me … it’s saying I haven’t completed the last criteria in all 3 of those raids … so now I no longer have those achievement points.