I'm going to assume that the map was split into two parts to make it harder to find, but since both the Rebellion and the First Order were looking for Luke, I'm not sure who did it. Unless it was Luke himself.

Also, I think Adam Driver (Kylo Ren) not looking the part of the baddy was a deliberate choice. Because he actively chooses the dark side and hates that he's got good in him. He's not really SUPPOSED to be a bad guy. So I think choosing the funny looking baby-faced guy was intentional (disclaimer: I find Adam Driver ridiculously attractive).