I have a subscription and I still don't have full access
Accessing all of Dwell's features
When you click on any of the options to "Unlock everything" (whether the banner at the top or in an attempt to access paid content), you'll see a link just below the Annual and Lifetime options that says "Restore Previous Purchases". Go ahead and give that a click.
That should move your subscription from whatever account it might have gotten set up on, to the account you've currently signed in with.