7th Legion Reputation has reset

Character: Clare
Race: Worgen
Class: Warrior
Level: 80
Server: EU-Argent Dawn

I would also like to refer to this thread on the US forums, since the problem still exists:

My 7th Legion reputation has reset. I know I used to have it, I have the exalted tabard as proof on the character.

Please do fix this bug if you plan to add furniture to the game retroactively. I would be really upset if I had to farm this reputation again. Right now, I have no access to the vendor either. Reputations are a huge time investment, and losing user data like this is a critical bug.

Thank you!

Edit: I can see the Exalted achievement now, but my reputation is still at Friendly.

Edit 2: It seems you have also managed to lose a whole expansion worth of reputation of some people:

If you plan to add furniture retroactively to the game in player housing, then it is critical that you fix this. Why should we bother farming reputations in the future if you lose our user data and progress of the past? This is very demotivating.