JetBlue Sale and Continental's Typo Response

JetBlue is having one of their periodic sales, with fares from $39 each way (e.g., Boston to Columbus) up to $129 each way (Washington to Oakland).

What's especially fun is that Continental matched some of these fares out of Newark, and even beat them, with, for example, Newark to Portland ME, Burlington VT, Rochester NY, Buffalo, and Syracuse for $38 RT plus tax. Only a few seats/dates were available at those crazy low fares, but they were definitely bookable. We think they might have been typo fares (they meant to hit the one-way button but did the RT button instead).