[wingnut60]

This is good time to fix things forever on the roof. The aluminum is the transition between sidewall and plywood roof, and generally is only held down to plywood by staples. Because of the bend in the aluminum, it is constantly trying to straighten itself and the staples are not always enough to keep it from lifting.
RVFlexArmor roof shop will fix it all--this is the complete replacement roof and takes all the attachments off and fixes the underlayment problems, then puts the liner on and replaces the attachments. Just about a permanent fix, check it out.