required field in content in flexifield when at least 1 or more

An issue i encountered and dindent find a clear solution for.

When you have a contentype A with required fields.
Use flexfield in an other contenttype B set the required field and number to unlimited.
flexifield provides always 2 posible entrys of contenttype A. witch has required fields for the first and second posibilety.
When you only need 1 you cant validate contenttype B becouse of the mandatory fields in second posibility of contenttype A.

I hope i explained it clear enough.

kind regards