They're just fit. I'm pretty comfortable walking around with them on. It's not tight. I can still feel a lil gap inside the boots.
It's just when I ride with them, especially when I tried to do jumps, the bottom of my feet just doesn't feel right. It feels like the muscles at the bottom of my feet are being pull to both side. I never felt anything like that on my size 10 boots
Your feet are probably swelling, which is normal with bloodflow/activity, but once swollen your boot is too small.
You can try aftermarket insoles but this does not sound normal.