If they're curling that's probably a bad sign. Numbness is usually either from boots being too small or too big and over-compensating for it. Sounds like yours are too small on that one foot. I guess that's the foot that's bothering you?
And I know people on here hate going a size up, but I was in a size 28 boot before I knew anything about boots and how they fit, and the only consequence was less control (big issue but not painful), or numb feet from cranking the buckles. Only one issue at a time though. I usually ride in a size 26 now.