Summary: so building this pillar all of a sudden i notice it turn in to 3 builds…
I cant reproduce but here’s what happened.
what started this. By accident i selected walls (plausible room) instead of single blocks.
then i used that as a single block and for some reason it allowed me to place it in a single block area. doubling the slabs in same spot i notice this and use undo to remove the wall. 10-15 undo’s back.
then continue to build the pillar and notice this…what the pic shows…regret not saving it at that point…
but i tried to first remove the building by first finish editing and remove. did nothing so tried console delete nothing happened… So i saved at that point.
Now i can log in and delete it with console. and i can link the 2 buildings again but undo remains broken.
the 1 block in the corner was where the wall was placed and it still has a building number as well
so a few different weird things going on there. so uploading a save!
Expected Results:
Actual Results:
Notes:
Attachments:
https://drive.google.com/open?id=0B7Sa8ogmH3qhaGZnVzItd0FHVjg
Version Number and Mods in use:
a18 r663
System Information:
1 Like
Caught it in the act this time and uploaded a save before i used “Destroy” on the building but same bug.
(i did try using ingame tear down and tried to reload and it acts like that never happened)
i build the highlighted wall first. then mine some lines of dirt with instant mine.
connect the 2 walls and then i notice they are several walls all of a sudden.
https://drive.google.com/open?id=0B7Sa8ogmH3qhWWh1WlhEWmg0Z00
its near the 2 knights statues.
2 Likes
So i found the bug 100% now 
its pretty simple to reproduce really!

Basically if i start building something of a wall it will turn in to its own entity.
Like shown above thats 4 buildings
i think it then bugs out when i start connecting these together and it breaks undo…should have tested that >.<
but was excited i found it 
1 Like
yea thats totally it.
after i you reproduce it also allows you to put blocks inside walls by dragging.
deleted 4 rows of blue blocks to show that blocks are stacked in the wall with the color change.
no broken undo tho 
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and finally broken undo
not totally sure how i did that one tho >.<
1 Like
Not sure if this is the same bug but just noticed this.
walls arent solid 