Using a z-wave stick, you pair the stick to hubitat using the SiLabs software. You then remove the device and re pair it through the second controller without security, then remove the second controller. It's actually pretty easy. We can link you to the step by step.
On the z-wave details page there will be a firmware update button if your hub hasn't been updated
No a virtual device would only show in your device list. Those ghosts (with the discover button next to them) are caused by incomplete pairings. The first thing to try on that line is to click the refresh button on the ghost line and see if a remove button comes up. If it does click remove. If it won't remove you will need a z-wave stick with the SiLabs software to remove it. Ghosts will trash your mesh and nothing will run right. For some tips look to this link
