Used to and its a PITA to get the configuration correct. The registry gets confused on what needs to go where.
So, try unplugging all monitors plug them in one at a time.
So boot up with playfield plugged in, then configure that in PBX and whatever emulator your using. Then shut down, plug in the 2nd, configure, then shut down and do the same with the 3rd.
There is a registry where you can hard code these but i cant remember where. In my setup the numbers don't match up either, my playfield is 2.
So in your display settings go an look at what the PC assigns each monitor after setup, and move those around until it resembles your cabinet setup.