There are a couple wood machines on my street that have been running for several hours. I fueled them, began making boards and, like the Energizer bunny, they keep going and going and....
I believe someone may have interacted with the machines shortly after I began using them. Maybe this created the problem. Confused. :/
EDIT: I notice that I'm not the only one experiencing this problem. I'll report the bug in-game as suggested by someone from an earlier post.