We recently upgraded 2 of our fire sticks to the lastest generation.
These firesticks were both showing movies, that we owe in the recent page, however we haven't watched those.
I checked my devices and only my current devices are registered. I also confirmed that our view history, doesn't show these movies in the history.
Why are these devices showing these movies?
Welcome to the forum! When you purchased the new Fire Sticks, did you do it on your account or a different account? By default, the Fire Sticks come pre-registered to the account they were purchased on, unless you check a box to not register them to an account. If they were purchased on another account, check that account. You'll then want to de-register or factory reset the Sticks, then set them up using your account.