listener on windows using wrong directory structure

Previously installed Oracle 10G and 11G R1. Yesterday, installed 11.2.0.3. 
Today decided to shutdown the 11g r1 listener and start the 11g r2 listener. 
Would then change ports on 11g r1 and restart it for anything needing the old 
listener, i.e. extproc. Well, I halted the 11gr1 listener and attempted to 
start the new listener and received a message that "listener already running"!! 
Did a status and it is using listener.ora from 10G directory! Set oracle_home 
and tried another status and it is now using listener.ora from 11G R1 home. Why 
isn't it using the correct home?

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