When a bo3 object is told to spawn at, say, heights 15 to 15, the object will spawn with at least 1 block of height variation (in my case, 15 to 16). TC 2.7.2

Fixed by 11bb54f, Thanks for the bug report here 😄

Forum topic for cross reference: http://forum.mctcp.com/t/bo3-objects-spawn-with-a-1-height-variance/888/8