I just installed my Retrax MX yesterday and aside from the poorly constructed assembly instructions ,I too have the same issues however, I loosened the entire cover and slid it back with one person on each side to close the gap from the cover to the tailgate, which helped quite a bit, and pressed downward on the cover to close the height gaps. In regards to the leaking that I have encountered, I ordered all rubber seals and will remove the cover and apply it between all trouble areas and snug it back down! This will be a weekend project and results pending along with an email response to the company