Just some thoughts that form in my head after the result.
Humans are beings(mos of them) of many faces, their personality almost never fit into any of the pony archetypes.
You'll sometime get the personality you aspire to be rather than what yyou currently are.
Your personality will change with time
These are probably the factors that a quiz cannot accout for.
My result registers a strong influence of pinkie pie and rainbow though im mostly reclusive my nature irl.