I have built and uploaded my site (www.sproxton.org.uk). I added the Analytics code to the Head going through Utilities --> Web Properties --> Website. The legend on this pane says that the code will be added to all pages.
Having uploaded all the pages I inspected the HTML files using Notepad and could not find the code. I thought that there might be a glitch in the system and decided to add it to each page separately. So it was in both the global place and individually.
After a bit the code was in the HTML files twice.
I have now removed the code from the individual pages but the code is still there twice.
When I last uploaded it went very quickly and I wondered if the individual pages had not been uploaded. I will now try and edit a couple of pages to see if that forces a correcting upload. I will be back to report but would be interested in any comments from the experts.