Gomez,
Falling off? Or breaking off? I haven't noticed any problems with mine, with either, and I've cranked down pretty hard on it. I can see how it could fall off, but it doesn't seem likely without either some serious help, or a defect in the bandage. However, a statistical sample of one isn't much to base an opinion on so...if there are problems, please let me know. I have opened one, and have 9 others still sealed.
As for the "pressure on only one spot", I don't see that as a problem. Aren't you supposed to put direct pressure on the wound site, rather than around the entire injured body part? I'm no expert, so please correct me if I'm wrong, or have misunderstood you.
Take care,
Andy