What's wrong with my tonneau cover?

I think all the parts are orderable

 

@PeteK I've had my cover on for about a month now and mine too has shifted to the right. I wouldn't say a whole inch, but it definitely has. I haven't done any off-roading either, just normal driving. Did you happen to find a reason for this and/or a solution? Thanks!

 

Only thing I can think is it was overtightened. And the rubber flap at the front was curled under. Once I fixed the rubber flap and tightened properly, it has stayed put. Shifted after 10 days. Fixed 3 months ago and has been ok since.

 

The rubber flap was installed correctly... so over tightening must be the culprit. I loosened it and we'll see if that does the trick. Muchas gracias!