Continuing the discussion from OliveTin for Channels: An Interface for Misc Channels DVR Scripts & Tricks:
This topic is based upon my previous post as follows:
Yes, I am receiving repetitive identical email notifications at the specified interval in the OliveTin action. I have killed and restarted the action for different intervals and the notification repeats according to the setting. This was triggered by a single source addition earlier in the day.
@mjitkop I took a quick look this morning, and it appears the issue has to do with these new "native" sources having underscores in the name.
The create_local_file_name function replaces spaces with underscores when writing, and then get_source_names_from_disk reverses this process by replacing all underscores with spaces. As a result, the reconstructed ADBTuner - app cbs never matches ADBTuner - app_cbs.
I also wondered if it could be something about the source name. I deleted the source and re-created it with a new name. I restarted the notification action with a 5 minute frequency, and am not getting repeated notifications. I have only received a single message about the creation of the re-named source.
Thanks for investigating, @bnhf, and thank you, @jsfullam, for confirming.
I was thinking about it since last night and suspected some type of mismatch between the source name and the file on the disk.
You saved me some time for investigation. 
I'm quite busy this weekend so I will probably not be able to work on a fix until next week.