Yes, what he said. Factory rep responding as requested. Without pictures I can only assume that the slide was installed, maybe it shifted, needed adjustment and new holes were drilled? Does it look like that? Plastic flat plug would work if its a concern. Expanding foam and then shave off the bottom when it dries.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).