It's funny how we are all different and have a unique way of managing incontinence. I have seen this evidence on a website and it backs up what you say.
When I used to wear pads, I found I always leaked at the back of my legs and always wore a tight pair of underpants over the top of the pad.
It's a case of sticking to what works for you in these situations and I am pleased you have found a solution to this problem. Here's to a good night's sleep!