They release completely normally. What you don't seem to get is that it's a well established fact that the FKS/Pivot indicator tab doesn't always line up exactly when the forward pressure is functionally correct. It all depends on the wear of the boot, which boot it is (the ISO DIN specification actually has quite a bit of leeway, to the tune of a couple of mm if I remember right so not all boots are the same).
I would much, much rather have a binding that was functioning completely correctly, with the indicator tab a couple of mm from where it's "supposed" to be, than have one that was "correct" but let my skis fall off at bad times. Disclaimer, if you even think about adjusting your FKS/Pivots your legs will curl up into prezels and you will die, not my fault ok?
The guy with the brake issues - take your ski, put it on a bench, click a boot into it. Then grab the back of the boot at the top and pull it forward, to mimic the forces of a heavy switch landing. If your forward pressure is out by a bit, the heel of the boot will rise and the brake will come down slightly (or a lot, if they're really out...) - this may be the problem you're having. More disclaimers, listening to the internet about your bindings will cause your skis to smash into 10000 pieces and embed in your eye sockets. So don't do it.
You can check it based on the white tab at the rear of the heel, it should be within (or flush with, depending who you talk to) the 2 little black raised bits on either side of it.
However! Setting them juuuuust right tends to be a bit of an imprecise science, it comes down to boot-binding compatibility, how worn the boots are, exactly what length was used when mounting your binding, blah blah blah. You're really best off getting someone who knows the bindings well (not someone who is just going off what the 1 line in the paper manual say) and can check they are functioning correctly to set it.