USA Softball tournament, early in my career (so I was a bit of a greenhorn redass). Pretty much the situation you describe, but first, a quick prologue.
These tournaments are quality tournaments run by a joint venture of a local organization and the park district. Facility staff are all regulars and work these things all summer. As I am approaching the gate and wheeling in my gear for the day, HC BigPants is harassing the little old ladies working the gate about wanting them to let his parents in without paying or him not having his pass or some of his usual BS. I nod a sympathetic nod to them on my way in.
During a morning game, while I am PU, HC BigPants presents as the HC at the plate meeting. In the middle innings, he decides he is going to start taking phone calls while coaching third base. I call time, take out my lineup card and walk down to discretely talk to him. I tell him he needs to take that off the field. He says "Yeah, yeah." I walk back and look up, and he is back on the phone. We are playing this game. "Coach, take it off the field!"
"I need to deal with . . . "
"I don't care coach. You can't have electronics on the field and I don't need you taking a line drive."
"Do you know how much money I spend at this tournament?"
"I don't care. You are going to have plenty of time to take calls if I have to remove you from the game."
He relents, bitching and complaining the whole way.
Fast forward to a late afternoon game with one of the several HC BigPants teams. The head coach presented to us at the plate meeting is a young female. Mid-innings with BigPants' BigBallers on defense. I have a whacker at second base, calling the BR safe as she stretched a single into a double on a lazy play by the outfield. Crowd is screaming and yelling. Here comes HCBigPants on the field. I assume he is headed to his pitcher, but he keeps coming to me. He starts very loudly with, "How can you . . . "
I cut him off. "Who are you?"
I don't think he even remembers our interaction earlier in the day. "I'm the head coach and . . . "
I cut him off again. "No, sir. SHE is the head coach," and I point to the coach who came to the plate meeting.
"I'm the one who writes the checks and I had to coach another team so she was just . . . "
"And you were not at the plate meeting, so you are an assistant coach for this game. You cannot be out here."
"You don't know how much money I spend at this . . . "
And I launched him.
The TD was already watching and had to get him off the field. I became the stuff of legends (for the next two days). The little old ladies at the gate heard about it. They brought me donuts the next morning. One of them told me, "I hate that @$$#0!3. Thank you for kicking him out, somebody should have done it a long time ago."
So, no, tournaments don't make it confusing. They make it very clear. The person who comes to the plate meeting with the line up card is the head coach. We don't care what your org chart looks like.