Does anyone understand why in the QX60 there is no way to independently send or control heat to the second row seats? There are controls in the second row for both temperature and fan speed, but as soon as you set a temperature which would necessitate a call for heat, the fan immediately cuts out. It appears the only way to get heat to the second row seats is by virtue of the floor vents under the driver and front passenger seats. But in order to do that, the driver and front passenger have to set the vents to the floor position in the front and have to set their temperatures to a heat setting - so in other words, the second row passengers only get heat if the front passengers also want heat. I thought this vehicle had tri-zone climate control.

Hey, welcome to NICO Club!

I found a manufacturers video of the instructions you have in your user manual. It might help you figure out how to work heat in the rear.
https://www.youtube.com/watch?v=2pLsl8rU7e0