It's about whether it's in order, so if you're voting yes, you're saying that it's in order. If you're voting no, you're saying it's not in order and you're disagreeing with the chair.
Does everyone understand?
If you vote yes, it means you agree with the chair's decision. The amendment is therefore in order. If you vote no, it's the opposite.
(Ruling of the chair overturned: nays 6; yeas 5)