as above - mine did the same. Drove into a space with a low kerb, great until you back out and rip all the under carriage off. Made a right fookin mess of mine, ended up having to drill new holes and fit additional clips as all the clip holders snapped off
Bumper is scraped badly underneath now too, will have to wait till summer to see if it will polish out, but not visible from eye level.
Incidentally the rubber strip had got sandwiched between the under trays, I too thought i had ripped it off but thank fully it was still there, just needed teasing back out again.