Feldon Rothgar has given us the all clear on those AA Reset issues:
It looks like we’ve found the issue related to the AA reset and coming up with a plan to fix it as soon as possible. Even though we’ve seen a few posts of people mentioning this happening prior to the merge and on other servers, we are currently only aware of a merge-related issue. There may be something more obscure happening to cause this problem elsewhere, and if it comes up we will look into it as well.
So for now, we’re going to fix everyone on Everfrost that is having the problem. We’re going to try to do this without bringing the server down. However, if you’re affected by this bug and online, you’ll need to relog and then reset your AA’s one more time.
Players who have not had their AA’s reset yet should not have to go through this after we fix the issue.
and later:
The AA problem should be fixed now. If you are currently online you will need to log out and then log back in. When you log in, you’ll need to spend your AA points one last time, but they should no longer reset.