My pleasure! Indeed, forgot that cause it's more intuitive for me to hold it .
Yes, CMD-Z is your is your friend while grasping the mechanics of this .
This is not true. While dragging a take (at least in 10.5.1) and the placement indicator line is above a take, it will be moved below that take. So if you drag Take 3 above Take 1, it will be moved below Take 1, ie. to the bottom.