Is the "top" sorting option working as intended?

Maybe I'm just not aware of how the "top" sorting is supposed to work, but it isn't making sense to me right now. I was just looking at top of 6h, and noticed some strange stuff.

• top thread had about half the favorites as the 2nd post but a few less boosts. Both were newer than 6h.
• a thread with only a few favorites and no boosts was just hanging out amongst posts with 50-100 favorites.

Are favorites and boosts accounted for differently in sorting? What about dislikes?