They didn't use a bi-directional pull. Just pulled and stapled and in a couple of the pics pulled trying to hide their slack. I almost thought in 2nd pic that they didn't trim the facing right until I saw the stretch down and bubble. Bad pulls and staple placement. Using more of a side to side stretch and adding an angle at the corners when putting in the feather strip would have eliminated pretty much all of that. Easy fix,just have to pull the rails and restretch correctly and work it out. Will look at pics later when I'm not on my Droid and back on my laptop. See what else I can see.