I had set my war defense team and before the war began, leveled one of the troops from 10 to 11. When I hit the info button on my team, it still showed the troop at lvl 10. But when I hit the edit button, it correctly showed the troop at lvl 11. I pressed apply, exited out went back, hit info and it still said 10.
I had to change to a completely different troop, save that and come back to the lvl 11 troop to get it to display correctly.
I have a video of the behavior which I cannot attach, but it should be easy to reproduce.