Re: Need some guidance -- Rust issue
I would leave the seal of as long as possible, disconnect the battery and leave the door open. Wipe down the wet seal and check that no water is inside it.
Let it all dry out then coat the doors behind both seals with silicone grease or similar before replacing the seal. Once in a while re-check the area for rust, beating rust depends on keeping it at bay for as long as possible.
I would check to see why one side is wet and one side is dry, maybe you can solve the problem of were it gets in.
You have had some fine but finicky cars.