Multisite new site duplicates master & shows as blank in the drop-down & sites list

When creating a new site, it creates a space in the drop-down menu and paging showing the sites, but it doesn't show the title, that section is blank.

The link for these new sites go to the settings for the original site, so is just a duplicate of the master site, with any changes being made to the any of the sites just makes those changes to the master site.