In March my spouse and I opened and funded a joint account using my spouses frequent flyer numbers for 50K AA and 50K Delta miles. I am wondering if I am now able to open my own account (note: Spouse is listed first under joint account) and use my frequent flyer number to credit the miles to. If I am unable to do this could I remove myself from the joint account first and then try to open an individual account to obtain the mileage bonus?