That is correct for the Face Frame style. You can also use a Finish stile on the ‘space’ side since it doesn’t put connector holes in the sides, which you can’t use in this case anyway.
No need to change the default of a Connector (or Finish) stile width. Let’s say you want a 6″ Connector stile. After clicking the first time with the story stick drag the cursor out along the construction line and without clicking a second time type 6″ (or just 6 if your default dimensions are inches) into the VCB. When the dialog box appears, choose Left or Right Connector. CabWriter will draw a 6″ Connector stile. The other stile can be drawn with the default size and then they would not be overlapping and it will be obvious which one to delete.