Master and Slaves issue
These say that it is replicating:

     Slave_IO_Running: Yes
    Slave_SQL_Running: Yes
           Last_Errno: 0
           Last_Error: 

Seconds_Behind_Master: 0


Check my.cnf on both the Master and Slave -- look for replicate/binlog_do/ignore_...  Perhaps you are not allowing some databases or tables to go from (do) the Master or be received by (ignore) the Slave.

The various %read_only variables control whether or not you can connect to the server and write; replicated writes are always allowed on the Slave.