BUG in battle

I made me attack with 19 units, parked in city 11 interceptor lev1 and lost 2 unit and battle had 2 rounds?

I attack with 17tank and 10 infatry in 1infatry and 1 anti air in plains and lost 1 tank 1 infatry and battle had 2 rounds.

I attack with 9 tanks in 1 tanks in plains and lost 1tank without lost losing condition the enemy tanks and battle had 3 rounds.