The radio activity over "being handed a list" is Young taking a reading off the LPM -- [link to ares.jsc.nasa.gov]

It takes the device 60 seconds to stabilize after the range switches are altered -- this is almost certainly what the "minute" requested by Young is, and why he begins the readout shortly after Ground says "ten seconds."

So almost certainly, the OP has the voices swapped (not hard to do -- you can't see lips move through a space suit.) The "kneeling stage hand" is the LPM, on the end of a long cable, and Duke is the one over by the LM.

The reason Duke is standing by the LM without moving, and the reason Young comments, laughing, that he's gotten a historical picture -- well, it's too funny to spoil by saying it now. Read the journal yourself. Already I've apparently spent more time researching this than the OP has.