i wasn't there, but on our june trip, we noticed differences from night to night. the first night, Jacques and Gus were dancing with Suzy and Perla, and all four had lights on their costumes. the rest of our trip, Jacques and Gus were not to be found. and Suzy and Perla did not have lights on their costumes (which made them VERY hard to see). also, the dancing couples in the Cinderella section would go from four couples to two, depending on the night.
my guess would be something wrong with the Alice float. without that float, there isn't much point in bringing out the rest of that section.