Often I'll just be looking through he enemy stack & it will go to the plan attack dialogue.
Also occasionally double clicking an empty hex brings up an empty dialogue.
Double clicking is a common occurrence for me - what with old age & turettes...

2/ Why does it go to the next unit when I've moved a unit? I usually want it to stay on the selected unit. I guess this may be something in a previous version I haven't noticed?
3/ What's happened to the "move entire group" option?