Some Movies and TV series that were added to My Feed for notification when available, after it became available & watched it purchased can't be removed from my feed, because the [remove from my feed] option has disappeared as a option for certain programs that were added for notification more than two years ago! I have notified Roku Suppot several times, which they replied it would be corrected in the next update!!!
I have the same issue. I've long since stopped watching a particular TV show and removed it from My Feed. However it continually, constantly shows up there! I hated the show and I hate it constantly being on My Feed.
I've been waiting months for Roku to fix it - but nothing yet.