If you are writing about the 1881 census you have mixed up two households - the women were not in the same one.
You write that your gggrandparents were James Watson and Catherine Quirk, married 1882 IOM(Douglas).
Then you say that your ggrandfather was George(Quayle)Watson, the son of Margaret Quayle.
Was he the George William b.1883 who Donna found?
Was he living with James Watson and Catherine Quirk, and, if so, why do you think he was not their son?
Sue