Level 70 class quest not available.

[Brightamethyst]

please don't bother typing a post if you are just gonna say "Ohhh you missed something" or "You need to do main story quests" because I DID NOT miss anything.

You haven't missed anything that you know of. Let's be real here, you probably missed something. What are the odds that the game is actually bugged vs you missed a quest somewhere and didn't notice?

And one other question: How do I change my main character for Forum Posts? It is listing the wrong one over on the left. In fact, I have gone into settings and looked at everything, I can see all my characters there, but there is no way to change or update the main character.

If you go to the forum settings menu (top right, next to the logout button) you'll see an "edit character" option in the column on the left. That'll let you change which character is linked to your forum posts.