Cover and Seat Questions - Damaged?

Hello All!

I was hoping that some folks on this site could help me with a few questions.

Boat: 2010 MBSports TWB

I went by my dealer today to pick up my boat from some warranty work. When I get there, the cover has a dirty spot and is sagging behind the tower on the drivers side. When I take off the cover, I see two of my seats sitting under the sagging part of the cover upside down on top of each other. The water had leaked through the sagging area into the seats and boat. The seat on the bottom looked to be bending as well.

So, some of my questions:
- Once these type of covers get a sag, will they eventually form back to normal, or will this cause water to pool on the cover for the rest of the covers life?
- Since the seats were updside down, they both had TONS of water inside the seat (inside the vinyl)...gallons...Will drying these out and cleaning them up make them good as new? OR will there probably be some mold growing inside the seat now? There was mold on the outside of the seats and different areas of the boat.

The boat was dry and clean when dropped off, so this all occured after I dropped it off.