faucet drips

Did you use teflon tape or pipe dope on the threads when you replaced the seats?

I think you just answered @Alan (California Radiant) Forbes 's question. I've had water leak past the seats where they screw in. It can be a little frustrating. Seal those threads and see if the leak is gone.😎

Yours, Larry

it is possible to cross thread seats when you reach in to replace them, that will cause a leak also