I'm using my favorite list. I notice some of the TGID numbers are not on the computer database, but are listed in radio reference.
You are likely scanning in ID Search mode, instead of ID Scan.
ID Search will stop on any active talkgroup that is on the system, as long as it is not either avoided (locked out), and it is not in a department that is avoided.
ID Scan will stop on
only the TGID's you have in your Favorites list. However, since the Denton P25 system is relatively new, I'd expect more talkgroups to be added by the various agencies using the system, as they refine what they want or need.
If you created your Favorites list by appending from the main database, you may have not gotten all the ID's in use, as more have been added since your list was created. I would suggest that you edit your Favorites list, and add a "Misc department, then set it as Avoided (locked out). Then, move the talkgroups that don't interest you there, and the scanner will skip them, while leaving you in ID Search mode so that you would get a look at any new ID's. If they one's that don't interest you, add them to your Avoided Misc department.