What does Numbers 16:18 mean?

And they took every man his censer, and put fire in them, and laid incense thereon, and stood at the door of the tent of meeting with Moses and Aaron.

And they took every man his censer, and put fire in them, and laid incense thereon, and stood in the door of the tabernacle of the congregation with Moses and Aaron.

And they took every man his censer, and put fire in them, and laid incense thereon, and stood at the door of the tent of meeting with Moses and Aaron.

So every man took his vessel and they put fire in them, with spices, and came to the door of the Tent of meeting with Moses and Aaron.

And they take each his censer, and put on them fire, and lay on them perfume, and they stand at the opening of the tent of meeting, with Moses and Aaron.

When they had done this, Moses and Aaron standing,

And they took each his censer, and put fire on them, and laid incense thereon, and stood before the entrance to the tent of meeting, as well as Moses and Aaron.