Hi Don...
In regards to the leveler. Looking at the pad, it would have an AUTO button on it if it was a automatic model. What type is it? I ask for GS used a few differnt ones. Then we may be better able to help. Mine is a Power Gear automatic. They are not hard at all to do manually. Sometimes I even use it in manual mode.
Dealer did not know much! Ouch! Who did you buy it from?
On a side note in regards to the original question on the cargo doors...You also may be able to find something you can put in the track between the doors without using a rivet. Usually their is a little plastic insert.