Unfortunately, that is not how a +1 breeding token works.
See the information on tokens here:
http://cruinndracfarms.com/wyrmwiki/ind ... tab=TokensEssentially, a +1 breeding token adds a breeding to any breedable Wyrm.
For example, here is Artemis:
http://cruinndracfarms.com/wyrmwiki/index.php/ArtemisYou will note, he has --
Breedings: NONE
This means that he is out of breedings. You can add one to him in order to use him for breeding purposes by using a +1 token.
The tokens are meant to allow people the chance to continue to breed Wyrms which are out of breedings, or to use them as a way of negotiating with other handlers. For example, you could say: "Hey, I want to breed to your Wyrm. I'll use my +1 token on him/her so that they don't lose any breedings!"
It has nothing to do with the number of clutchmates from a breeding.