Hey @MickeyC, thanks for swinging by. That does sound a little odd. Can I get you to log into → https://sport.optus.com.au/. We'll need you to follow these steps:
-Click on your name on the top right hand corner of the screen.
-Click the settings option from the drop down menu
-Click manage devices
-Confirm how many devices you have registered
Remember you can only remove/add a device once every 30 days.