I'm running the RotRL Anniversary Edition, using the fast XP track as recommended. (I've thought about going XP-less and just leveling when the book suggests but I've found in other games the players lose interest in side-quests if they know I'm doing that.)
It seems to me that Thistletop has way more XP than it should, especially in the surface areas. My players hit third level right after starting Thistletop, as the book suggests but they've accumulated enough XP to hit level 4, and they haven't even gone into the dungeon levels yet! I looked ahead and it seemed like there was enough XP in the dungeon to get them well into 5th level, which is pulling way ahead of what the adventure says should be happening.
Did I do some math terribly wrong, or am I missing something obvious? I have 4 players, so everything should work fine just handing out the XP as listed, divided 4 ways, right?