I think in Game 3, when you Droll after the Robina search (when he surrenders afterwards), the normal summon after search happens immediately after it, a new chain hasn't started. So he'd have to normal summon, lets say Eaglen, effect to search THEN you could Droll. It ultimately doesn't change anything, since Eaglen search would cancel out cause you'll resolve backwards and he'll be under the effect of Droll, but I'm just saying for ruling purposes

why the left guy constantly shuffles his hand?

Jiaolong is not a quick effect and doesn't summon in the same chain. He summons on a new chain.

Empin is not once per turn god dammit