I know. I just found it funny as it was right after Willy mentioned exactly that. Does it mean someone else voted both down? I'm not familiar with how this particular bug works, but previously it was based on other associated IP addresses.
They should not be made that way. A single prop should have one option, that can be answered Yes() or No (). I know that we banned one troper a while back for misusing Single Props (making them with multiple options, or making the only option "do <this>, and <that>, and <the other thing>" in an effort to game the system and force the outcome he wanted).
...if you don’t love you’re dead, and if you do, they’ll kill you for it.
It strikes me that for a question like this, where people are supposed to pick between A and B and not go (1) both, (2) neither, or (3) add an extra option, an up-or-down vote would actually work better than the one we have here.
(edit) true, we shouldn't call it a single proposition because it isn't. But if we had a kind of crowner in the interface called "runoff", then it could work like that.
Maybe this is just a sign that the appropriated Crowning Moment of Awesome-determining mechanism we've appropriated to make wiki decisions might not necessarily be the best infrastructure for the purpose?