In order to turn it off, you need to change it from " True " to " False " inside of their .ini file located in your HDD, you may have turned off the wrong thing and that would explain why it shill shows up.
What you're seeing is the " Off-Host " Menu this is a menu that provides aim bot and stuff you can use when you are not able to use your actual on host menu, this can be disabled in the .ini file though located where your Stealth Plugin was placed, hopefully /HDD
Edit: as you stated in a recent edit, you're running the game from a disc, this will not matter, although if you are wanting to use a patch that comes in the form of a .dll then you cannot, as this is a modified gamefile that allows you to do this, you'd need to install the game onto your HDD by burning it with FSD < FreeStyle Dash >
- Now if you're using a .xex based menu it really does not matter & you can use that perfectly fine disk or installed verison
Last Edit: as for " Being signed in on another console "
This could be an issue where you swap KV or the server isn't pulling the KV on your HDD, or maybe it's using the KV on your actual console & swapping between, sometimes I've seen the message but it's nothing to worry about, you can ignore that, change your password if you wish, although it is 100% nothing to worry about.