Signup Form: Domain selector situated on strange position

I found that in the Signup Form the Domain Selector appears on a strange position (please see attached image)
- Is there a way to move the selector to the back of the sub-domain input area?

Also looks that there is a missing tittle (please see same attached image). I think that it have to be with the Multisite Privacy plugin.

Thank you for your help.
Best regards.

Jose