Deleting Stored Photos

I have the iPhone 5. I take lots of photos and they get stored automatically in 3 albums: 1) Camera Roll 2)Photo Library and 3) 2011-06-20-001. The third album with all those numbers has duplicates of photos from the other 2 albums and I believe is using-up lots of available free storage space. When trying to delete photos from the Album 2011-06-20-001, I cannot delete; it only gives me 2 options: Add or Share. How can I delete this third album off of my phone? Thanks.