You aren't able to see which app or add-on added activity to your account, but you can see all authorized ones here: https://trakt.tv/oauth/authorized_applications. You can revoke authorization for all and add them back as you use them to help track down which is causing the issues. Revoking and reauthorizing also fixes a lot of sync issues, so you could revoke at https://trakt.tv/oauth/authorized_applications, and then re-authorize each app or add-on immediately and see if you're still getting unknown activity added to your history.
Mchristensen40
Is there a way to see what specific device is being used to watch specific shows on my Trakt account? There are many on there that we have not watched.
Thank you!