You might just have some old Wonder Under. The adhesive has a shelf life. You also may have misread the directions. :oops:
I use 805 all the time and have never had it lift off even a little bit with no edge stitching at all. I used to use Steam-a-Seam2 Lite and got tired of not being able to hand stitch through it and having my machine needles get all gummy. I like Wonder Under much better than any other fusible available.