Thanks for the responses everyone! Here's a little more detail about my issue.
I have been wearing a Rearz safari medium. The diaper is extremely comfortable: padding is soft, fit isn't too tight, stretches well, etc. The "fit" seems right, as the top of the front and back of the diaper lie just above my waist and below my belly button, it's not too tight at the legs, and it does not chafe when I move around. I "point" either forward and slightly down so the back will catch most of my liquid. I do not point to either left or right so I don't overwhelm the leak guards. I have been experiencing leaks at the back of the legs when I wet a medium amount. When I say "medium amount" I mean about full capacity for a store-brand diaper like depends, but nowhere near capacity in my favorite diaper so far, ABU space.
Three times so far I have experienced substantial leaking at the rear leg on both sides. This is messing with my head, as I have "leak phobia." It took me forever to even be able to lightly wet a diaper because my potty training instincts were so hard to overcome. Through lots of time, I have gotten comfortable wetting. A big part of my ability to wet freely is security against leaks. I wear only premium, high-capacity diapers, I wear plastic pants over them, and I have a water-proof mattress cover. That is the only way I can let go without being bladder-shy.
Recently, I have leaked from Rearz safari AND Gary plastic pants on three separate occasions. Never had this problem with ABU Little Pawz medium. Is Rearz safari flawed, or am I doing something wrong?