It certainly can. Though how many years has the split been this way & not adjustable?

Also how many would even click the button/box to adjust the donation. It was hidden until I clicked on something to go deeper.

I would not have been suprised at a 90/10 split & most would rightfully be upset that only 10% of their donation to a candidate would support the candidate. I was amazed that the candidate got 10% of my initial guess.