That is correct. Hitting remove on the device list wil put the hub in exclusion mode if the device was a z-wave device. Once it recognizes it is no longer in the z-wave database, it will remove it. However, if after a short timeout period, it sees no change, it will offer a Force Remove option that will delete the device but leave it in the Z-wave database. This could create a new ghost node…
Sometimes one needs to keep trying and sometimes it will eventually work. You may need to turn off some breakers…
Check your logs and see if there is an associated message. It can help diagnose the issue. Go ahead and post a screenshot if you can.
There are times where the ghost can not be removed by the hub and a USB z-wave stick must be used. If you find that you need to go that route, the write-up linked in the following post might be useful:
I am not familiar with the device in question, but as far as I can remember, I have only seen grayed out removal buttons on child devices. In those cases, the parent must be removed.
That said, removing the device from the device screen will not help with the removal of the ghost. It would be best to leave that one alone.
