I think I found a bug. When I try to give Lionel back to the elves, it…

I think I found a bug. When I try to give Lionel back to the elves, it won't let me. Maybe I am just trying to give it to the wrong elf, but I've tried all but one. And that one is down below on a level that isn't reachable. There is no way to it. Is that the bug, or is something else wrong, or am I just doing something wrong? I tried playing the game over again, and the same thing is still happening. Could someone please help me!!!