I noticed that when running the Kovarex Enrichement, all output from the centrifuge is counted in the statistics resulting in that in my current game it says that I have manufactured more Uranium 235 that I have mined uranium orein total (several times more)

I currently have around 8000 u235but in the manufacturing statistics it says 530 000.
Is this intentional?
I assume that the Coal liquificationprobably does the same to Heavy Oil but have not tested it.