Where have you got this info?Why are neither of the two new services along the Atherton line scheduled to stop at Swinton, Moorside and Walkden? Given that Wigan will be retaining a fast train to Manchester, why don't Northern focus on improving services for all stations along the Atherton line, rather than just Atherton and Daisy Hill? I think Moorside and Hag Fold will remain hourly!
The additional trains will both stop at Walkden. It's a franchise requirement. Hag Fold will get a 2nd hourly train.
As J Collins has said the demand isn't there at present for extra services at Swinton or Moorside. When Swinton starts seeing the passenger numbers that Atherton and Daisy Hill currently get on 2 trains an hour then services may increase. Moorside only sees a handful of passengers on each service usually less than 5 boarding or alighting off peak.