It seems that answers to questions are sorted by (correct marking and then) reputation. This is nice for ordinary mathematical questions, where if someone has the same problem and finds the question, he'll see the best answers first.
It, however, doesn't work well for open-ended big list questions. It's not easy to follow new answers to such a question once you've read the thread, because they don't appear at the end of the list. After a while, what starts to happen is that people only read the first few pages of answers, and new answers aren't seen because they start out near the last page (because they have zero rep).
I'm not sure I know a good solution for this, but you could at least try sorting big list questions by post time, earliest first.
Update: of course, early answers are _always_ favoured to get more rep, no matter the ordering of the answers, because many people will only read a question once, vote on the answers, and never come back. At least that's what happens on perlmonks, it might be different here. Still, ordering by time makes this worse because it's much harder to find new answers.