You have to be a "regular student in a degree-seeking program" to get federal aid. Different schools handle this differently. Where I work, we do not allow summer students to get into a degree program, so they are guest students ... and guest students are not eligible for aid. I would bet EMU would classify you as a guest student, so you would not be eligible for Pell.
Rules being made after the year begins is par for the course in financial aid.