Marriage for Susan and David is on SP isn't it, 1882 in Port Glasgow.
And in 1891:
David Rodgers 36 coal dealer b, Donegal*
Susan Rodgers 30 b. Port Glasgow
David Rodgers 8 b. Port Glasgow
Margaret Rodgers 7 b. Port Glasgow
Mary Jane Rodgers 3 b. Clydebank, Dumbartonshire
Rebecca Rodgers 2 Months b. Clydebank, Dumbartonshire
William Mcelhiney 23 boarder b. Donegal
Address: 7 Elgin St, Clydebank, Old Kilpatrick
So you have all the details to confirm that Mary Jane's mother was Susan McCrory (birth and marriage). It is only in her death registration that the informant has made a mistake with her mother's details isn't it. A pain when this happens, but it did happen that mistakes crept in if the informant made mistakes or simply didn't know the right details.
Monica
PS: Lots of potential siblings showing for David in Donegal on Family Search indexes, with parents David and Mary (Curran).