Jose Manuel Moreno Ramos
I think I speak to the first two.
I believe for infiltration it needs to meet both conditions.
Defeated units are flipped over to mark that they need to be cleared or are US controlled. If a unit is removed due to night or infiltration it is placed back into the cup.
I've never run into isolation, so I don't remember those rules off the top of my head.
Hope this helps, it's a wonderful game.
Your answers help me a lot!