What we loosely refer to as the “Beowulf Manuscript” is actually a collection of manuscripts bound together by Sir Robert Cotton and known as Cotton Vitellius A XV because of its location in his library. The British Library has published an excellent description of the Manuscript contents that should clear up some of the confusion caused by casual references to it.
The BL article, What’s in the Beowulf Manuscript, has images and links to the recently digitized version of Beowulf and other manuscripts in the codices included in Cotton Vitellius A XV. A quick look will straighten it all out in your mind and lead you to other interesting works. Kudos to the British Library for all their recent work on Beowulf, Judith, and other manuscripts!