Ferjo: I will agree with you that the rules are not always easy to understand. (If someone would like to re-write the rules to be clearer, I know Fencer would take a look at putting them up - if they are good enough.)
But, in the rules it says something about the rules being the same as Checkers.
You then need to look at the rules of Checkers, and you will find this rule:
If the player has more possibilities to capture opponent's pieces, he/she can select any of them. However, when a queen (in variants with long jumps) can make a jump, the player cannot select a pawn to jump with.
Again, I agree the rules would be MUCH beter if all directions are in one place, and not have to keep looking at different pages to find the complete rules.