I have a duplicate of beacon,one real and one shadow
I think that's when I canceled the deconstruction then rested a blue print over
see in the middle, we can see double modules and my robot wait to place beacon!
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20160929014209_1.jpg (700.97 KiB) Viewed 752 times
Yes, if you put a ghost down while an entity is marked for deconstruction and then cancel the deconstruction you end up with what you have. Just don't do that.
If you want to get ahold of me I'm almost always on Discord.