you can use this comman to change the bcch
first for cell b use this command to delete extra bcch frequency
and for cell c
there are 2 channel groups per each cell : 0 and 1
every things seems ok and I am confused.
Infact there are no 2 bcch on a cell, but by RXCDP command there are 2 AFRCN in TX-4 and TX-6 (configuration4+4+4) that I suppose 2 bcch in a cell.