Yosemite iTunes update 12.0.1 keeps repeating the install

Early 2008 Mac Pro running Yosemite.  Update 12.0.1 for iTunes keeps repeating.  I now have 12 instances listed as being installed.  The notification for the update continues to be displayed in the App Store.  Has anyone else had this problem.  Otherwise I will start troubleshooting.

Boot into Recovery and repair the drive.
Do a safe boot.
Restore from backups and do a clean install of either Yosemite (and save the installer!) or Mavericks for now.
Your system use to be fine, so if you do install whatever you have on TimeMachine or cloned, make a new clone of the system to keep handy for safety net or dual boot.
Install issues with Yosemite have been seen, check Mac OS X forum, have not been over on iTunes forum which would be a good idea but it does not seem common let alone wide-spread. Obviously you want to uninstall iTunes completely so there is no remnant.
http://www.apple.com/support/iTunes

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