Lets start off with Horde side:
Using plot #9
Only thing I saw that was odd, was that I could only add extensions to the exterior, when looking at a very specific angle. I However saw noone else with these extensions, nor any alliance houses with any. So I assume I shouldnt have been able to access those nodes, at all, yet
Alliance side:
This is where things just broke
Using plot #6
Trying to move or rotate the house, would only stick, when leaving the build area. Selecting any other option outside, would reset it back to its original location and orientation. Even after, it had been successfully stuck in its new location, after leaving the build area.
Selecting different rooves, did not change the roof. Simply added the new one. And that counted for every color. Leaving me with every roof, cycling rapidly through every color, all at the same time.
But also, in outdoor edit mode, I could select the nodes from neighboring houses, and alter their appearance, as well.
As of right now, thats all I’ve found. Feel free to add more, if you seen anything else. 
Edit: Another thing is that when placing items outdoors, they are not aligned to the grid.