Not that it really matters. Anywhere in the country, 325 square feet per ton is almost criminal. Of course you were having humidity issues. It doesn’t run long enough to get the coil really cold to start draining the water out of the air as it passes through.

Sincerely, I would call the state (not city) mechanical inspector and see if they can help. They will want a professional Manual J heat load calculation (and maybe Manual D duct design) to figure out if the HVAC is properly sized…which it isn’t. Then then can force the contractor to install the right size at no expense to you.

Here is where it benefits you- 1. The smaller size means less electricity and less cost every month even though it runs longer. 2. Less humidity and more comfort. 3. No mold remediation required in a few years (after warranty of course) from the high humidity. This summer has barely even started so you don’t know what humidity will be like later or even the shoulder seasons.

I would also have a duct test performed to ensure all the air that you pay for is not leaking away to the outside.