Old Friends bugged?

I just did Old Friends and 2 really annoying things happened. I'm pretty sure one of them was a bug but I don't know about the other.
I attack a Dark High Priest max dmg he can do is 1000 splash so I attacked him with 25R (1000hp) but still he manages to takedown 25R and 100LB in 1 blow. Eighter he's dmg is higher than it shows or he bugged cause no where does it say he can hit for 1100 like he did.
The other thing was that I took down the Witch tower first and then the Bone Church. After this I ment to take the last leader camp but I couldn't do that since all my Generals packed up and left the map. Is this because I finished the quest eventhough I didn't click the quest icon? Or is this yet another bug? I lost close to 1.5k xp due to this...

So all in all I lost 100LB and 1,5k xp more than what I should had.