Hi Karen
Don't know if this is an awful lot of help ?   
Listings from Wise's Directory NZ  1910 - McINNIS (sic) - Miles E. ?  - printer - 136b Great King Street, Dunedin
1913 - McINNES - Miles - printer - 46 Athol Place, Dunedin
1919 - McINNES - Miles M. - printer's mchnst (machinist ?)
           92 Hanover Street, Dunedin
1921 - McINNES - Miles - (same occ.) - 262 Hanover Street,   
           Dunedin
1924 - NOT LISTED !    (Checked up to 1928)   
( 1922 and 1923 were not available  :   Directories cover listings for all over NZ:    No sign of an "Ernest McINNES" anywhere) :
You'd have to guess (I suppose), that the whole family "upped sticks" and moved to OZ ?
Lu