A 15 point difference in Captain average is a 30 pt difference in total score. Ie 5 X 15 X 2 = 150
Ok, this is kinda of hard to explain, but if you have ablett say over cox, that would of been a 25k difference at the start - so you paid for 15 of those points at the beginning - took away 25k from the rest of your side - hence 15 of these points shouldnt be included.
Its hard to explain but ill give an example.
Pretend you started with ablett, say he was priced at 500k (hypothetically) at the start of the year, and you chose him over kane who was 450k (hypothetically). While yes he averages 15ppg more, this should not be doubled, since you have paid 50k to gain this benefit - 15ppg was gained through paying for it. However, there is 15ppg gained over kane by making him captain (no extra cost involved). Does this kinda make sense as a hypothetical scenario?
And besides, 150 points isnt a great deal of difference anyway.