@Ipsquiggle,
I added the save files via the edit of the OP.
The patch today added new achievements? When I started tonight I got the notice that I had achievement, clicked the notice, and I got 3 sounds but one update, which did highlight and show as done. Think it was "To Pay The Bills".
Let me know if you need anything else. I am beginning to suspect that it is a typo or confusion from kj / kJ / mj / mJ as they are in the game. Here are a few pics showing what I mean, and I am sure there are other places I did not check. The circuit I listed shows 3.0 MJ(j) stored, though I am not sure if that is a special "J" being used for joules, and how that relates to the achievement listing "kJ"
Let me if you need anything else and I will keep playing the test as I can.