Some combinations are not displayed on the product detail

[jwebcreation]

Hello here is my config : 1.6.6

My problem is very simple, i have generated some combinations on the back office but not all the combinations are displayed in front office. You can see attached two files showing the two type of combinations activated on the back office, and on the front only one combination is displayed.

The two type of combinations are generated and created the same way, there is no difference between them so i am not understanding what factor makes that one is displayed and the other not.

 

Thanks a lot for your advices