When I've backed up my iphone/ipad, I get that some times so I went here https://support.apple.com/en-us/HT203160 & after I did what it said, it told me I have it authorized on 5 computers including this one. How can it be authorized on 5 other computers when I have only one? I do have the lates version of itunes. Today is not the first time this has happened. Totally confused.