#1 - May 21, 2013, 8:53 p.m.
Blizzard Post
The achievement, Tyrannical Conquest, is only intended to be awarded when players earn 25,000 Conquest Points. Due to an issue that was not detected during the PTR testing process, the achievement could be awarded much earlier than intended. We are currently in the process of working to resolve the issue.

In the meantime, we’ve applied a hotfix that temporarily prevents players from purchasing gear from Tyrannical PvP item vendors.