@Ilistentomusic8 Nice to see you around the community.
It sounds like someone else may have been accessing your account if you are seeing content in your collection that you did not add yourself.. This can happen if you remain signed into your Pandora account on a public computer or someone else's device, or if your device was sold, lost or stolen. To help protect your account, I recommend signing out of all devices and changing your password to something new.
For instructions on how to do so, check out the accepted solution to this thread: How to sign out of all devices on Pandora
Let me know if you run into any issues with this.
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