ok, the file you posted is not the one witch is shown in your screenshot from post #1.
it is a single letter 3, where all the coordinates are negative.
i am not sure in witch Units you working , Inch or metric ?
this letter 3 is ablout 18 mm or Inch wide, and 36 mm or Inch high, depends in witch Units you are working.
normaly you have the X0 Y0 of the workpiece in the lower left Corner, but you can also go with negative coordinates,
only depends on, where you physicaly Zero your work coordinates.
so it Looks like you have to work the on "handling" of your postprcessor, and get a Little bit more familar with
Programm origins, work Offsets and this stuff.