Duplication of photo albums in iOS 5

I performed a backup process for my photos after I have upgraded into iOS 5. I have created a folder named "iPhone Pics" where I synched all of my photos since iTunes requires such. The Photo Library and Camera Roll from my iPhone will then synchronize with the iPhone Pics folder from iTunes.
At this time, iOS 5 does synchronize with the same folder, however, aside from Camera Roll and Photo Library, it copies the iPhone Pics folder as well, so my photos now are being duplicated.
Can someone please tell me how can I resolve this issue? All I need is the Photo Library and the Camera Roll in my iPhone.
