Listener complications in second oracle homes after 11.2.0.3 upgrade

Hi Everyone,
I am running Oracle 11.2.0.1 64-bit on Windows Server 2008 R2, and Application Express 4.1.1.
I decided to upgrade to 11.2.0.3 for the security/general fixes. I installed 11.2.0.3 into a separate home directory (home2) and then upgraded the 11.2.0.1 database using the DBUA. The upgrade went fine, and the database/Apex started up without incident.
At this point, I had one listener running from home1 - I have multiple database links and TNS entries which ran perfectly in 11.2.0.1. I figured since the database was upgraded, I would create a new listener from home2, replicate the listener/TNS entries for the database links but point them to home2, and turn off the listener from home1. So I did this, ran the listener2 on the same port as home1 (obvisouly after the original listener was shut down), and things were working for the most part, except that the database link queries in the Apex application would fail intermittently. One time it would work, the next time it would say "TNS error: connect identifier could not be resolved". This never occurred in the original configuration.
After some fiddling around with various listener settings, I ended up running the listener from home2 with the exact same listener.ora, tnsnames.ora, and sqlnet.ora files from the home1 NETWORK\admin folder. So basically the listener2 service is running, but all listener entries are pointing to the home1 location.
I am confused on how this is working... first, why would the listener2 running from home2 have random problems with the database links, and why does the listener2 configuration work while pointing to home1?
Any info is appreciated.
-Ian

I figured since the database was upgraded, I would create a new listener from home2, replicate the listener/TNS entries for the database links but point them to >home2, and turn off the listener from home1.inplace of moving listener.ora file into new home,can you try to create new listener by using NETCA.

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============
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