yetanotherx/WorldEditCUI — pull request #12 by GuntherDW (2012-09-01 19:54:19+00:00)
Title: Wrong method used for setEntityPositionToPlayer()

Your obfuscation seems either out of date or wrong, but entity.d() will *move* the player an extra pair of coords.
It *adds* the numbers instead of setting them. IE If you're on x:1 y:60 z:1, It'll get moved to x:2, y:120, z:2, to x:3, y:180, z:3 and so on.

You want to use entity.b(), which sets the coords in stead of adding them, and corresponds to the correct MCP name.