I was placing some lanterns on my buildings today and one of them was placed higher than the others. I could not get an option to move it.
hmm… thats strange, are you able to get a screenshot?
I went to get a screen shot and I was able to move it. I guess I couldn’t before because I was in the place item interface.
Ended up with a ghost chair on a roof I can not move/undeploy. I have it selected in the screen shot.
I think that if you have that chair into an stockpile, build a ladder to the roof and they’ll place it. Once placed you should be able to undeploy it.
Other thing you could try is to use the remove tool or the cancel task tool, but I’m not sure if they’ll select fine on a roof.