Help please......Liability v Payout

Hi all,

I'm trying to understand the use of the "Payout" calculator
on our beloved site!

I don't have a problem with "Liability" but the other option is confusing me.

For instance I am wanting to lay a number of my selections in The Place Market.

The longest price is 6.6
and the shortest is 1.7

I have put £14.00 in the box as it will not accommodate all my selections at much less.

The stakes are 6.6 @ £2.12 down to 1.7 @ £8.23
Liability on each in "Place Bets" is £13.99

The thing I can't grasp is that in the projected figures
each liability is reduced by the stake amount so I am showing £11.87 on the 6.6 and 5.76 on the 1.7

I would have expected it to be £13.99 x number to place
which would then be reduced by the win (for me) stakes
on the rest of the selections!

Sorry if I am being stupid but I was away from school when they did Payout Staking!