The post processor is made up of 3 files, and the solution is going to go into the Control Definition. First with the post processor you want to work on loaded, go to the Machine Tab and then into the Machine Definition Manager.
Once the Machine Definition Manager is up, go to the Control Definition Manger by clicking on the icon in the top bar.
First thing to check is the Post Processing settings. In the Control Topics, go to Files and you can find the Post Processing Dialog. When selected another window will pop you, the same window you see when posting your program. Whatever settings you make here will be the default settings when you post your program. The File extension used can also be modified on this page.
Next in the NC Output Control Topic, you can set the Sequence Numbers. You can turn them off or modify how they are output as well as the maximum number.
In the Misc. Int/Real Values Control Topic you can set the values for the settings when the toolpath is started. Warning on these settings, if you change to a different post, if the Misc. Int/Real Values don't have the same function and/or use the same values, you will need to reinitialize those settings.
In the Control Topic Tool, you can Enable Staged Tool Routines so the code will output the next tool in the program.
In the Control Topic Arc, you can set the type of output for your arc, the way the arcs are broken up, and if you can allow helical toolpaths.