Not unusual at all. In fact, it's quite common. Here are two from my collection. Notice the subtle differences in spacing between the examples most noticeable in the spacing between the third line "N.Y.":

Getting back to your example, it looks as if the precancel overprint was misaligned so that you have two bars showing below the State name on a single stamp. Obviously, the correct configuration should show a bar above and another below the City and State name.