Mike
3
Not sure where to start…
You did not say what you tried to change the extension to, so no judgement there.
The CID number you are seeing can be set CALLERID(num) and should be set to the node number.
Is the pjsip module enabled ?
Most of that info is asterisk stuff and not specific to app_rpt/ASL3
Are you using the latest revision of the software ?