So I opened a GM ticket and explain what had happened and although he said I wouldn't be reimbursed, I would have to try again when the cap bug is fixed.
So here's my questions:
Q. Is it fixed?
A. Because the GM seemed to think it's temporarily hotfixed and not properly fixed.
Q. Are we still allowed to earn conquest points past the Battleground cap of 1800 from doing the PvP daily quests, as we were allowed to last season?
A. Because the GM didn't know the answer to this and wasn't sure if it's meant to be this way since 5.4 or if it's a bug still.