What guidance do you have for someone in charge of a section with people who outrank you?

I'm a SPC (74D) in charge of the orderly room. I worked as the battalion commander's driver/assistant when I first arrived here and in S3 as the schools/training NCO. My 1SG said he wanted me in the orderly room to be in charge of soldiers and get ready for the next rank. I don't know if this is connected but he said it right after I asked him for a recommendation letter because I want to apply for CID. Now I'm not even promotable. My first board appearance is not for another 2 weeks. There are 4 people that I am in charge of for accountability purposes. A PFC who is the 42A here, a SPC and SGT who works down in the supply room and a SGT(P) 92A who works in the orderly room with me (we're a small organization). The NCO has made it very clear that I am not in charge of her and would not give me her phone number for accountability even though my counseling explicitly says its my responsibility to do so. She has also made it very clear that she is not doing anything to maintain the day to day functions of the orderly room. She's only doing the maintenance portion. Doesn't help at all. But is always telling us how the orderly room should be maintained (whether it be appearance or the way paperwork is handled). When I question it 1SG says she's an NCO you have to listen to her. I have told my 1SG multiple times that I welcome the responsibility to prepare for the next rank but if this how things are going to go then she should be NCOIC because its not really my orderly room. Its really difficult when I have a way I want to handle something and then she throws a wrench in that, especially when she does nothing to maintain daily functions and is barley here to begin with. He says I'm staying in charge because he wants me to grow.

Anyway today I got fed up. We are going through company clean sweep and there are boxes everywhere because we're sorting through/ cleaning out paperwork getting ready for COC and COR. 1SG and Commander has walked in numerous times and have said nothing about the boxes. I have an appointment to get the paperwork shredded (way too much paper for the office shredder). Both are aware of the appointment. She told me I need to move the boxes somewhere else because of the clutter. I told her "no this is my orderly room and I'm handling it, the appointment is in a couple days". Long story short I got yelled at by 1SG and he told us to figure it out (this isn't our first disagreement).

Can someone please give me advice or guidance on how I should move forward since we're both going to be here for a while. I think if she's going to work here and give orders, naturally she should be orderly room NCOIC. If not, I don't think I should be told how to run this orderly room. My 1SG tells me I'm in charge and he trusts me to handle it, while at the same time saying I must obey everything she says.

ps. She has passed the board and ALC. She is just waiting for points to dropped to get promoted. I really don't understand why I'm in charge of this orderly room.