Well, we obviously know why WERB had to move. My friend Michael Collins tells me that years ago he had something to do with getting 97.3A allocated to Litchfield and WERB would've been in WZBg's protected contour.
As a Class D, WERB is afforded no protection whatsoever and must accept whatever it gets. WYBC is a Class A and i believe their protected contour is only to like the 60dbu, which is less then 22 miles.
While the required spacing between 2 class A's on the same frequnecy is 62 miles, nots not the same between a Class A and a Class D.