I just checked those dates on PL and there aren't any Disneyworld hotels in the Express deals.
When you're looking at Express deals in Orlando, you have to select Walt Disney World-Bonnet Creek as the neighborhood, especially if you're looking for All Star resorts.
If you click on the "Book" button and you see any "additional mandatory fees" then that is NOT a Disney hotel (Disney resorts don't charge resort fees). I know they've been changing some of the listings to make it harder to see those resort fees, but if it's listed at all, it's not Disney)
All Star hotels will be 3 star hotels.
Hope that helps!