Why scanned twice? You should only need to scan it once, using the Hubitat mobile app. Then verify it gets added to the SmartStart list, it should say Pending.
You can also use this app I made to view the SS list from the hub UI, so you can verify it is on the list and setup correctly: [APP] SmartStart Manager for Z-Wave (Long Range support)
I have some broad SmartStart instructions on my second post in that thread as well, you can check those and maybe it will help.
