Call Tiffin and ask for a contact number for Phil Hollingsworth. He's Tiffins West Coast Factory Rep and will be able to inspect your roof and decide what happens next.
From your photos, I really can't tell anything - it looks like a perfectly normal Tiffin roof. If you are going to photo document this, you are going to have to do a be better job with the camera.
You can also send the pictures to Don Boyd in the factory service dept. His e-mail is
don.boyd@tiffinmotorhomes.com. Include your purchase date and VIN#. This will get your problem registered in the warranty system.