Adventure battles say they are easy but opponents are very hard

The latest adventures say before a battle that they are easy (level 11 opponents) but they are actually very hard. 30000 plus. I am level 50 and lose to these almost all the time… Is this a bug or do I misunderstand something in the game?

This is a bug I believe is resolved in 2.1 - but I’ll follow up this morning in case I am thinking of something else!