So I thought I would check to see if any of my purchased iTunes songs could be upgraded to iTunes Plus. So, I click on the Upgrade My Library option on the iTunes Plus page of the Store and it tells me I have 1 song that can be upgraded. Well, here's the problem, firstly, the song listed I don't even own, and secondly, I know that there are songs I do own that are available via iTunes Plus that are not listed. Any thoughts? And, as a follow up question. If I go to one of the songs I already own and but it in iTunes plus, do you think it will figure out I already own it and charge me $0.30 or do you think it'll charge me $1.29?