I think they should unload if they're not in loaded chunks
Put all the commands I used in repeat command blocks, except the command that makes the score.
The entity I used was a boat.
I think this is a more specific bug. I do have a few other commands on separate scores, but they don't teleport the boat up or affect the teleport command or the score 'Hoverboat' I used.
Changed it.
The versions affected selector is not working for whatever reason.
I think this is either my graphics card or some problem with the flat world generation.
To reproduce the issue, I generated a superflat world with the classic flat preset world. Then, I put fire charges in dispensers and activated them at the same time. When it went into non-generated (not unloaded) chunks, it would stay there and do a little graphics glitch. I check mcedit and it said there were fire charges there, though the game is registering it. It does cause lag and the entity does turn towards you if it's in a loaded chunk.
I doesn't seem to happen in a regular world or amplified world.
It's probably not a 1.9 thing.
Voted