I replaced an old 890 with a new one, along with the RF receiver and renamed them both as "New 890" and "New RF Receiver". Even though I have deleted the old ones every time I need to update my remote/receiver, the old equipment shows up again. I then need to stop the update, delete the two old pieces, and then start the update again. Next time I tweak something and need to update, there they are again. How do I make them disappear for good?