Not sure if I'm mining wrong or if this is a bug but either way it's annoying:
I mined a tunnel entrance (straight) and then mined the next tile down. It resulted in a tunnel I can't enter..
I had this happen with another tunnel before. I think in that case both times I mined down and wound up with a tunnel I could barely enter but occasionally could clip through.
So is this common? Is there a way to deal with it?