Hmmm. Sounds like the bindings are too tight when you're riding. And having them on in the house, or sitting down at the computer is really not a particularly good equivalent of mimicking the boot in a riding position.
You said that you're toes are slightly curling. Wear 'em barefoot until they pack in a bit more.
Numbness can be a few things, the liner being too tight, cranking your bindings too tight, or bad socks. I'm ignoring the fact that your boots could be too small since you said they fit well. The first two are self-explanatory, as for socks, get some that wick moisture away from your feet. If your feet sweat and the wetness stays on the skin, they will be really cold.