Configured 2 Listeners Through Netca In Different Ports

I have 2 databases( A and B).. which shares common ORACLE_HOME.i configured 2 listeners through netca in different ports and both listener names are different...

But when I stop LISTENER.. both the listeners are getting stop and when i start both the listeners are up and running.. and I could see database B's services.. and vice versa.and when i tnsping , i am able to see port 1521 default port for database A.

when I run I bash, i have included ORACLE_HOME path... so should i add oracle_SID also there..if so, which SID should I add A or B? from where listener picks the default information???

>> when I run I bash, i have included ORACLE_HOME path... so should i add oracle_SID also there..

Yes, among MANY other things.

CODE#*************************************************************
# Create an alias for every $ORACLE_SID on the UNIX server  
#*************************************************************
for DB in `cat /var/opt/oracle/oratab|\
       grep -v \#|grep -v \*|cut -d":" -f1`
[code]....

"ERROR:ORA-12514: TNS:listener does not currently know of service requested in connect descriptor"