Monthly DB Claim

I am a Lifetime All Access Member, since the last patch when I go to claim my allaccess 500 DB reward it stead of saying claim it has the tab saying to add time. I have a few other accounts which I pay yearly and don't have that issue on them.

Just click yes, ignore the add time. They're trying to get you to pay more into the future I assume.
Wording is not their strong point.

Tried that, it takes me to the DB store area for membership

And you get to pay for things cheaply. (likely stuff you dont' need - xp pots)

Wait until you hit the 30+ day mark according to this thread:

DB Store Asking for $$$ for Lifetime SUB to get monthly 500 DBC ? | EverQuest Forums (daybreakgames.com)

You have a gift for understatement.