Hey, I'm unsure what's happening there but the logic seems to be right? I'd have to look at a clip of it to figure out what's going on because I just tested some bird card gameplay and the math is pretty much mathing as it should so I'm unable to really fix what doesn't seem broken. Is it possible that the additional damage you're taking is actually from the weather and seasonal buffs? The stats that are on the left?
I'm not sure why that would be happening only on the Bird cards, but I'll look at it. If it keeps happening I'll just ditch the Bird cards, they aren't worth the damage loss. It is exactly the damage of both cards added together BTW while the opponent only takes my Bird card damage. Maybe it was just that launch instance, I'll try to nail it down.