1861 census, Dalry has Alexander McBlane, 30, with wife Mary, 30, born Ireland, Robert, 3 and .
1871 in Auchinleck has Alex McBlane, 40, wife Mary, 39, born Ireland, and six children including Robert, 13, born Dalry.
As this is after the marriage of Mary Fisher to John Moore there can be no doubt that these are two different Mary Fishers.