Compasses point off from the center of the stone, this could be due to a bug, design, or the origin being off on the structure?

Id suggest that the compass should point to the origin of the structure if it doesn't already. If the origin is where the players spawn then for more "realism" compasses should point at the block that the sign is attached to, or otherwise find the center of the memory stone.

ye, this is a bug - it should point to the block behind the sign.