I know this has been brought up before, but what i've noticed seems to be a little different than just the normal inconsistency. You get what the planet screen says, but only pay what the spending screen says. I designed a tiny ship with nothing on it for a cost of 35bc. I set my starting planet to build this 35bc ship. My inital colony has an mp of 24, and I purchased a basic factory with 8mp. AT 100% spending, 100% military, The planet screen shows 35 military production, however the domestic policy economy screen only shows me spending 32bc on military. I have no bonus to military production at all. The ship finishes in 1 turn like it said, and I verified that I only pay 32bc in spending. Both screens are correct?
