A:
Because I'm not a lawyer, I cannot speak to the legality of what happened.
I will only address procedure.
First, a board can only conduct business during a regular or properly called meeting, or an adjourned meeting, at which a quorum is present.
All board members must know when and where their meetings are.
If, in an emergency, an action is approved by a poll of the board, in person or by telephone, then that action must be ratified at the next board meeting.
If it is not ratified, you may want to consult with a lawyer as to whether your organization is liable for any contracts signed and monies spent.
You may also want to consider disciplinary action, including removal from office, suspension, removal from membership, or censure.
Just to make it clear: there was no vote taken; only a poll.
(RONR pp. 476-477.)