My itunes is 11.0.5 but it says I need to update to 11.0.5?

I'm trying to get Ios 7 on my Iphone 5 and it says when I plug it in and click update, "You need to update your Itunes to 11.0.5 to update your phone to Ios 7. But when I go to preferences and about Itunes it says current version 11.0.5, when i click update Itunes it says there's no update, WHY?

Actually you will need Itunes 11.1 to upgrade to IOS 7. Just go to itunes.com and click on the blue Download Itunes link. Run the setup file and you will be ready to go.

Check this out: http://www.filehorse.com/download-itunes-32/