Chests appearing through command gives a glitchy inventory + graphical issues.

What I expected to happen was...:
Chests to appear normally and sticking to their left or right partners to become a large chest.

What actually happened was...:
Chests appeared invisible until losing contact with all the other chests. An inventory glitch happend where the chest had two inventorys and I had 1.

Steps to Reproduce:
1. Find any area, and press T (to open chat)
2. Type this into chat: "fill ~10 ~-3 ~9 ~-10 ~-11 ~-10 chest" (can be configured) and a bunch of "chests" will appear.
3. Opening one will give you and a mojang member a headache (graphical glitch and inventory glitch!)