It is 27 days from the day you want to eat. The 15th opened up today and the 16th will open up tomorrow. Each day a new day will open up. Hope that helps.
This happened to us last year. We were all booked under 1 reservation but my dad's ticket was showing up just like yours. Called and they got it straightened out for us. They were very helpful in getting the fastpasses copied over to him as well.