Hi
Congratulations on your public tree on a commercial site - great to see such a well-documented/sourced piece of research. So often they are unsourced and incorrect.
Just some thoughts........................
His death certificate shows that the informant is an 'authorized agent' so we have no idea who actually gave the information, some of which appears to correspond with other information and some doesn't. Interesting that his wife is named but the section asking for his "issue" states "not any".
His actual date of death - 15 January 1960, buried at Fawkner, 21 January 1960
Speculation - given his connection with the Irish constabulary later and with the Irish Hussars I wonder if he may have been born in Ireland??
Good luck with trying to get any further with this chap who seems to have been a little economical with the truth at times.

Judith