hello albertramsbottom, i have some experience with this issue
If you are confortable editing source code it's possible solve it
You need to modify the file /admin/Security/signin.ascx.vb
Find the event Page_Init and put rems (') in the next lines
'Override the redirected page title
'Dim myPage As DotNetNuke.Framework.CDefault
'myPage = CType(Me.Page, CDefault)
'If myPage.PortalSettings.LoginTabId = Me.TabId Or myPage.PortalSettings.LoginTabId = -1 Then
' myPage.Title = Localization.GetString("ControlTitle_login", Me.LocalResourceFile)
'End If
In my case this trick works
Best regards