Thank you all a bunch ! I was experimenting the best way through attempts(after reading some guides) , but when I came to this problem I got really annoyed . Mostly because I think I grasped what you have to do and the best way but this "priority" problem passed under my nose and slapped me in the face after I was finally getting started with some breeding .
Thx to your guide Gilan I don't even need to complete my excel sheet for visual reference, pretty nice .