Downies have 1 unit (of 1/3 e charge)
Uppers have -2. Not +2 of the same thing downs have, something else with 2x opposite charge.
Electrons have 3, but aren't made of 3 down quarks, they're something which happens to have exactly 3x the down charge.
What the hell is going on?
Why does charge come in discrete units at all?