Same for me. In the old VR world, the TAC was the guy designated on the schedule regardless of rank. I've been an O-3 TAC with everything from an O-4 to O-7 2P.
Most of the time, the senior guys just wanted the stick time and didn't give a hoot who signed for the airplane.
One of the funniest incidents with a senior 2p (O-6): We landed in a C-12 on a Sunday. No one was around and our hangar door was open so I could put the plane away. Usually, the O-6 would get out, I'd attach a little tug to the nose gear and walk it into the hangar.
As we pulled up, he says, "Just taxi it into the hangar."
"No, I'll just shut down out here and use the goat."
"I said, taxi it into the hanger."
"Yes, Sir."
It was the only time in my Navy career I actually taxied an aircraft into the hangar and shut it down. I figured he was the second highest ranking officer on the base and just did what he told me to.