One says james is her grandfather but another says joseph is her grandfather, joseph was james son who they said married maggie corbett?
Sorry - but who is saying these things one
but another?
As far as I recall, you have Daniel and Mary McManus with children.
In 1911 -married 40 yrs with 11 children/6 still living.
You have the marriage of James, son of Daniel and Mary Ann; the 1901 census and the death of Margaret Grant.
You have a death for their child James.
You have a possible marriage for James and Catherine McKen..
You have a marriage for Daniel son of Daniel and Mary Ann and censuses.
You have some reference to James (possible son of James and Catherine McKen..) and Margaret Corbett (have not looked over this thread to find it but I know Maggie C is in 1911 census as a child.
You would need to look for a marriage /death for Joseph Moore here I think
https://geni.nidirect.gov.uk/Kiltaglassan has referenced the site earlier.