Hi A.,
I have had somewhat the same problem with my children - I have 4, and every one wore a different brand.
My first could only wear Huggies - I tried pampers, they leaked, as did every other brand I tried until she was almost 2.
My second couldnt wear Huggies - the only thing that didn't leak on her was Pampers. My son was different and could only wear Luvs, the same with my last - she's a Luvs baby too.
I think alot of the leakage isn't from not putting them on properly or tight enough, its the shape of their bodies and how the diaper fits - where it fits snug to be too tight or loosely enough to leak.
I have noticed that as they grow, I have also had to change brands because the ones that didn't leak, all of a sudden start to leak. It is kind of frustrating when you don't know that this happens and trying to figure out which brand to try next. lol
Hope you enjoy staying home with your little ones.