Unable to register extension (duplicates due to extensions_override_freepbx.conf)

[luckman212]

I added a context to extensions_override_freepbx.conf because I wanted the caller to hear a "ring" sound before my IVR picks up. The default IVR setups don't add this so I inserted it. Hey, it works- ok great.

But I just noticed that during startup of asterisk, a ton of errors get logged about being unable to register extension blahblah because its in use. Is this just "how the override is supposed to work" and safe to ignore?

[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'fax', priority 1 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'h', priority 1 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 1 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 2 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 3 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 4 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 5 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 6 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 7 in 'ivr-4', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 's', priority 8 in 'ivr-4', already in use
.
. snip snip
.
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'return', priority 4 in 'ivr-4', already in use

Another thing I'm seeing is this

[FONT=Courier New][2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'h', priority 1 in 'ext-fax', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'h', priority 2 in 'ext-fax', already in use
[2011-01-14 22:29:41] WARNING[8703] pbx.c: Unable to register extension 'h', priority 3 in 'ext-fax', already in use[/FONT]

I noticed that there are 2 contexts called [ext-fax] in my dialplan. Not sure how this happened or if it too is normal. I have an [ext-fax] at line 1422 in extensions_additional.conf and another one at line 622 of extensions_custom.conf. Bad?