It might be because you joined a production that has next dream time much further away...and times for Dream Fest are:
In PDT (Pacific Daylight Time)
6:00-6:30 AM
11:00-11:30 AM (previous one)
4:00-4:30 PM <- next one, the one you chosen personally
9:00-9:30 PM
11:00-11:30 PM <- your production probable chosen this one as the next one to participate in