Feature Boxes not updating

Hi All-

I'm having an issue with iTYunes U feature boxes not updating. For example, the "What's New" feature box doesn't put new collections in it automatically. Also, I've put some collections in a new order in a Custom Feature Box, and they aren't showing up at all in the feature box.

I've published changes, and waited the right amount of time (days in some cases.)

Any ideas for what's going on? Has anyone else experienced this?

Thanks-