Spot on LifetSavert911 with the observations. Regarding 1) there are other observations of this too, so my guess is that it is a bug.
In addition to your comments i may add:
5. POWER: Right now ALL modules/devices/things use a constant amout of power. However, when things like the smelter is not processing, the vehicel bay not repairing and most importantly the airfreshner not producing air (if the base + suit is filled) then they ought not draw power from the grid. Currently a rather large pack of batteries are needed if you want to sustain the base during nighttime, at least untill you can make a lot of RTG's.