There was a reason why I thought I had to put them on that way (which seems the counterintuitive way to do it), but I can't remember now what that was.
You certainly can't put your full weight on these pegs, but they will support the weight of one leg just fine. In other words, they're fine for riding.
Fitting us both on the seat is a squeeze, but it works and I wouldn't call it uncomfortable. Fortunately, after four years together, we still like to cuddle.
The Enertia seems to have no problem handling our collective weight, even with groceries and stuff in the bags, shoulder bags, our helmets, etc . . . I'd bet we're pushing 330 pounds sometimes. No problems, but of course I am careful to ride slowly, especially on the pitted streets of San Francisco.