My workers deconstructed a building

So I was trying to see if I could build a tower and after messing around with multiple tools I a little portion of the tower. So I wait for them to build and after I try adding another floor and failing horribly at it so I just leave it there and my workers start braking away at the building and I get all the wood back. I honestly have no idea why this happened…

I found this a few days ago and put up a small post on it.

Building Demolition Possible!

Hope this helps.