D'oh. I just went in, found the button and indeed, that seems to have been the issue.. Well, at least it's something simple (and stupid) that I overlooked. Could've been a big issue. Thanks for the help, I didn't know there was a button for that and I certainly didn't intend to click on it.. Whoops....

I was using the deconstruction planner to remove trees, which was working fine until I also selected some concrete walls to be deconstructed. From that point on, NOTHING I select to be deconstructed through the deconstruction planner gets deconstructed. I only have 20-25 construction robots in my ch...