So.. I want to be certain I understand the scoring.
A stack of 5 = 1 point and that stack of 5 is turned over to not be included in next "phase" of point calculation.
Of remaining cards, most of a color is discard.. all remaining cards are 1 point each.
Player A: 6 red
Player B: 5 red
Player C: 4 red
Player D: 3 red
Player A: 1 pts(5 stack) + 1pt (left over)
Player B: 1 pts(5 stack)
Player C: 0 pts(4 discard because highest of remaining cards)
Player D: 3 pts(1 pt for each card)
And if 2 players hold the most, both discard.