On Page 11 of the ACT Election 2012 booklet it says “If a candidate has more votes than the quota…..the surplus votes of that candidate are distributed….”
My scenario is –
The Electoral Commission counts the votes from a polling booth which heavily favors Candidate “A” first, Candidate “B” second, Candidate “C” third (perhaps “B” lives near the booth and “C” doesn’t). “A” gets their quota, “B” gets some first pref. votes and “C” gets less than “B”. Then the EC starts counting another polling booth where “A”s votes are redistributed but this time “C” is favored as second pref. more than “B” is. So “C” gets their quota.
But had the EC counted the polling booths in different order, there could likely be a different election result. Of course it wouldn’t work that way as neatly in practice, but I hope the gist of the scenario is valid.