I was told that he was born in Sydney but later found out that he was born in port Melbourne along with his twin brother John Moris Dodd and Roy Robert Dodd
Kandi, I think it is safe to dismiss this of twins etc.story as in accurate.
The births to Edward and Charlotte WALTERS have been listed in reply #33 and there were not others by the DODD names.
So it appears your great grandfather made at least two marriages and also there is the issue of Eileen who calls herself Mrs Walters, his wife, in 1923 and lives in Freshwater NSW.
Interesting he had said he intended to bring his English wife Phyllis Queenie to Australia in 1922, but was "married" to another by 1923 without any located appearance from Phyllis.
I hope I have this right

I am guessing your grandfather is still with us.

Sue