Some PTOs and PTAs have employees. I personally do not recommend this but some see the need for it and have the funds to be able to pay for them. One thing about employee costs that everyone ought to understand is that the costs always go up never down.
In this case the PTO has been asked to provide funds that they will obviously be asked to provide next year and will be expected to do as well. Also since the PTO will be sharing the cost of an "employee" this may open up another can of worms for them, it will depend on how they allocated the funds and the wording of the motion that was presented and passed.
But I read a political issue in the middle of this as well! One that can not be ignored because of how they are formed as a voting organization. Too many teachers on the board maybe? Why in the world the President here allow the super to just walk in and take over I have no idea, other than the political pull this person has. I also wonder why a district officer is bothering to come to a local school PTO meeting and using their position to bully something they want through a private organization. Let's face it if the super tells the principal to get that PTO off her campus it is gone! Talk about appearance of improper influance! This seems to me to be a matter for the board of education.
As for what has been has been, sorry live with it, but I would, if I were in your shoes, enforce roberts rules to the letter at every meeting in the future, until everyone got the hint.
BTW, I have run into this problem recently myself. Someone tried to comit our PTO to an expense they had no authority to do. At least in this case on this thread they came to your board first. My board refussed the funds. I know they are just loving the out of pocket espense they generated for themselves and I am anything but popular with them nor is my board
But then who said this job would be easy?