I noticed that on April 9th, EMH was morning at AK, now it's morning at EPCOT.
Where are you seeing that? The TA calendar is still showing AK. Epcot has AM EMH on April 7th.
I'm seeing it on Disney's site too. Looks like they switched the following week too. I wonder if it has to do with Rivers of Light.
I found it on the official WDW website.