Apart from upside down, It's also diffo. to both the ones I have. The older one has four positions with 'OFF' at the left, I think 2nd pos '1' does nothing, '2' does park/town/side light+tail/whatever, and 4th position '3' does tail/headlight.
When I figured I had maybe similar issues to you
, I bought an aftermarket switch a year or so ago, and does the same ('OFF' at left) but without a dummy '1' position, but I found the wiring to be different too
Have pics somewhere, I'll try dig'em out