One would expect that supply and demand would not increase together for any significant period of time.

Why? It happens like that for lots of things. Furthermore, keep in mind that growth in the supply of Bitcoins is somewhat artificially capped.

Is this an aberration or is Bitcoin going to stay at these pricing levels?

Any answer to this question is a guess. You can make plausible guesses either way, but if anyone knew for sure, they'd invest appropriately, keep quiet, and become rich.