The team you see on the defense tab is the team they attacked you with. When you tap "Battle", you'll see they team they put up for defense....
@Waymo.... The only thing I can think of is there was an error and you got the crap end of the stick when the battle froze? I once saw a Victory for my single Edward the Great defense team against a full team that I can only assume was a great attack team (Clansman, W Lillith, G Lilith, and I can't remember the 4th).....
I don't know, go figure....