Every year at this time, many Epcot restaurants have super limited availability. This is fully due to Disney holding back many tables waiting for CP packages to be released. Once the CP packages are released, many reservation slots will open (both normal and, of course, CP).
They do this so as to make sure that they block out enough slots for CP, so they overshoot. It's much better (albeit, annoying) than underestimating the table count for CP and having to either cancel ADRs that have been made, or overbook the restaurant by a large amount.
Bear with it and keep your eyes out for CP info, once they become bookable, snatch up those extra ADRs