I presume this Mira person wasn't totally freelancing -- how would this even end up being presented to the board without some direction from someone on the board. So maybe more like 3.5 against 0.5. It could have been a total flip flop, but that's a bigger assumption. I have no problem not assuming grand narratives until the basic reporting shakes out.
She was the interim CEO; it seems that it was her and some of the rest of the executive team, not the board, that wanted Sam to come back. The board apparently was working on finding a new interim CEO to replace Mira that wasn't in Sam's camp more than it was trying to bring Sam back.