So I was trying to boost my Badlands attack to hit some Invaders in my city. It showed me I had enough attack power to take out the big bad skellies. I attacked them, and it said "Nope." No Allies were bought away. When I clicked the skellies again, it still showed I had enough power so I tried again. Again, "Nope." Left the city, came back and tried again, same thing. My battle reports show a much lower attack power than when I go to attack. What's the deal?