Thanks - that worked. Though I don't know why DVS network fee is different.
Two other minor issues:
I'm surprised that registration button in the GUI offer faucets and not the option to pay from an account in the wallet. It might be easier for people to register new names from that button than using the console?
Then in Linux Mint which should be the same as Ubuntu, the top right window close button, doesn't always go to tray icon, with the program running in background and needing forced close from terminal.