I filled out a pretty detailed bug report last night. The ships are listed in the Ship Listing tab. They're accounted-for in both the sector summary (which shows number of ships, planets, etc. when you highlight a sector) and the unit limit (15 out of 10 units built). However, they aren't visible on any sector screen. I stopped all the auto-running to make it easier on you all. You can clearly see only 4 small harvesters in orbit in one of the sectors and 0 in the other. Yet, I should have 5 in each.
If you could do me a solid, how do you all personally go about changing a harvester's route? I'll be playing my first "competitive" game later today, and I'd like to avoid doing whatever it is that causes this.