After uploading an album to my iPod, I found that I'd misspelled the name of the band. When I right-click on the iPod icon or the album's icon, I'm not given the option of renaming or retagging. Why is this? How do I make corrections on my iPod?

Also, the albums that pop up onscreen when my iPod is plugged into my PC do not exactly correspond to what's on the iPod when unplugged. For instance, there are a couple of repeated album titles there that I'd tried to erase before. How do I get rid of these repeated titles?

Thanks.