Magic morning is good for one early entry to DL only, on Tu, Thu, or Sat. If you are staying at a DLR hotel, you get extra magic hours (early entry at DL and DCA) every day of your stay. EMH for DCA are on Sun, Mon, Wed, and Fri.
The one confusing thing is that if you stay on property and get a package your ticket will say it has one Magic Morning (which is technically correct), but adds no value as you get early entry every day and DCA entry which Magic Morning doesn't cover.