NASA: ah, that explains it
this one is for y'all to share. Explains everything
"...We tried to get the mix right, but if we can do better, we can propose changes..."
Dood. Mike. ASK FIRST!
It doesn't do much good if you've already quintecimated the field, to go "oops, my bad" a financial year or two later.
PS: NASAwatch has a take on it