Why do my iTunes purchases contain duplicate songs
I've just installed a new copy of iTunes on a Windows 7 machine. All of the Windows and Apple updates have been installed. The iTunes version is 11.1.5.5 (which is the latest version).
I have downloaded all of my previous iTunes purchases using iCloud. There is no other music or content on this machine.
The problem is that most of the albums contain randomly duplicated tracks. Here's a screenshot that shows the problem (six of the tracks in the album are duplicated):
How do I resolve this problem? There doesn't seem to be any obvious reason why it is occuring, or way to fix it.
Thanks in advance for your help.
Windows 7