Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, I recently saw this, when looking through the top guild. And i know Race-changing isn't possible, but when looking at the armory of kozy from Endurance, it says Kozy race-changed from human to dwarf @ 2013-12-18. how is this possible?

Greetings.

Kozy plays on ED, not here.

And on 2013-12-18 this server wasn't even opened yet (Yea, I now there was another Nostalrius, but it was also another set of characters etc.)