Pictured below is a photo of normal wear to be expected on the rails of your Tectonic cover.
There are 4 areas where this wear will occur during the break-in period on your new cover. The 4 areas of wear are created by the gutter on the mid-panel when it drops into the home position in the rails.
The wear on the rail seal with not affect operation of the cover or the longevity of the rail seals.