In the bounty FAQ it says
If you do not award your bounty within 7 days (plus the grace period), the highest voted answer created after the bounty started with at least 2 upvotes will be awarded half the bounty amount. If there's no answer meeting those criteria, the bounty is not awarded to anyone.
It should be
a scoring vote of 2 or greater, (or whatever terminology is used). When I say that it should be a scoring vote of 2 or greater I mean that that's how the system actually works and therefore the FAQ needs to be fixed.