Strange bug by calculating total price of multiple products

[DoubleTrouble]

In my store I have Mepps Black Fury lures with different sizes and prices.

Lure #0 cost 4.50, lure #2 - 4.70

I "made" new product that has 5 lures #0, and another one with 5 #2.

The calculation of the first one is ok - 22.50

But the second costs also 22.50 instead of 23.50

i.e the price is calculated based on the default combination rather than the chosen combination.

How to fix it? TKS in ADV

P.S. Prestashop 1.6.1.6

Edited December 1, 2017 by DoubleTrouble (see edit history)