The 101 bridge in F'ton Junction crosses the North Branch and the 101 bridge in Blissville crosses the South Branch. So the answer in broadest interpretation would be Yes and Yes. I have no idea why the summary is worded as awkwardly as it is. It implies that the entire Oromocto River (in which they parenthetically include the North Branch) is open til Oct 15; and that the South Branch Oromocto, which appears NOT to be included in the previous definition of the Oromocto River, is open til October 15 FROM THE 101 BRIDGE, DOWNSTREAM.
Personally, I'd seek a written answer from DNR on that one, although I expect any judge would find in your favour if you were fishing downstream of either bridge on the 101.
Note also that the Oromocto River downstream of Pride's Landing (just outside F'ton Junction is considered tidal, so the season from there to the mouth is open til Nov 30th.