Sloppy jump-stop??

[Vinski]

If I understand correctly, a legal jump-stop is executed when the offensive player dribbling in, picks up his dribble then leaps off one foot and then lands with both feet on the floor at the same time. However, I’m seeing more and more of these being attempted with one foot landing before the other. It looks kind of like a gallop. Wouldn’t that be a travel? I never see it getting called and the times I’ve called it, I hear the groanings that I don’t know the jump-stop move.