In the details is this:
Also, if NMSC receives notice of a change in college choice from a Finalist to whom a college-sponsored Merit Scholarship off er has already been mailed, the change in college choice will not be processed and the student cannot be offered another college-sponsored award—even if the new choice of college is one that also sponsors Merit Scholarship awards. (See page 3 of the Requirements and Instructions document which is posted online in the “Competition Instructions” section of the OSA or at nationalmerit.org/resources.)
Can’t have it both ways?