As shown below (screenshots taken at the exact same relative position and orientation), there are different placings that don't match with Mc 1.8
Please note that on the 1.9 screens that the appearing "zoom" is due to the small FOV change in 1.9

http://imgur.com/a/xCOsf

Also reproductible in earlier versions of 1.9 snapshots (not selectable in the "Affects Version/sRequired" field)

Here a few illustrations of what these render bugs imply on 1.8 ArmorStand Creations : http://imgur.com/a/r5nPF

These changes don't bring any coherence, and don't correct anything, this is why I hope that this is not an intended feature.

Thanks for considering this issue, Minecraft is meant to develop creativity, and this bug is ruining all ArmorStands creations