Left Shoulder of golden armor (Maybe any chestplate) overlaps the chestplate itself only on the left arm.

Cannot Reproduce: http://i.imgur.com/cxMcuSq.png

Heres an example. I Gave him a diamond sword, perhaps causing the issue with the inbalance. I used -100f 90f and 0f for the right arm and 100f 90f and 0f for the left arm.

Yes, indeed.

So it is a bug?

http://i.imgur.com/e4HteU8.png