door handle/mirror reinforcement plates

Who here has used the door handle and mirror reinforcement plates from Dynamic Renovations?

The instructions for the mirror reinforcement plates don't call for any urethane between the plate and the body. You just put the plate up against the inner door and bolt the mirror down. A few days ago I installed the mirrors using these plates. The install went fine.

Now, the door handle plate instructions call for using urethane between the plates and the body. I just got done installing the passengers side door handle and did as the instructions say. I put an 1/8" bead around the perimeter of the plate, put it in place and bolted down the mirror. After I got all the linkages hooked up I shut the door and had a look down the side of the car. The exterior sheet metal was sucked inward around the front bolt hole and put a big wave in the door. I loosened the nuts and the body went back to normal. I took the handle and plate off and cleaned up the sealant.

What is the purpose of using urethane on the door but not the mirror? I wonder if the urethane is what is causing the issue. The instructions call for putting urethane around the perimeter of the reinforcement plate but don't say anything about putting it around the front bolt hole. I'm thinking that the urethane around the perimeter is holding the plate away from the body slightly. When the bolts are tightened, the thinner outer sheet metal is sucked back to the reinforcement plate. I'm thinking there needs to be a bead around the bolt hole too or just install the plates dry. ???