Strange issue when adding a folder to a library

Greetings, I have what I hope to be a simple question. I have the default libraries and two new libraries I created. When I add a folder to them such as "My Playlists" it adds "C:" to the end of the name. I don't believe it did that before my computer crashed. Am I missing something and is this something that I can fix. When I go to rename the folder in the library the "C:" is not showing up so I can't remove it. Any help would be most appreciated. Thanks!

Yes, I did. No, I don't have multiple partitions. The problem is, say a have a folder under my user account called My Videos and I want to add it to the Videos Library. When I do Include in Library, the folder under the Video library is not called My Videos, it's called My Videos C: Very strange. Probably something simple I'm missing.

And, the folder is stored in c:\user\{user name}\ and is called "My Playlists". Thanks for your time!

Ok, this might help clarify a bit. You see where it has the (C:) in it? Why it that? I don't want it to do that and before my system crashed I don't believe it did that. Also, if I try to rename the folder it only shows me "My Music" to rename not "My Music (C:)" to rename. Does that make it a bit clearer? Also, included properties of the library. Thanks for all the help!

This is the strangest thing. I did as you requested... removed and included in several of the different ways and it's still being stubborn and wanting to put the (c:) at the end of the filename when included in a library. Also, sorry for all the emoticons. Thanks!