Hello BT-wasted,
in my install there is only the set of mission called "1968_KHE_SAHN", too.
If you look carefully at the BAT06 DOC, you will see that in the list of campaigns/missions for Vietnam, only "The Siege of Khe Sahn" tells you that this set is located in folder UM > 1968_KHE_SHAN.
For the other campaigns/missions we have only a title, but not a description or folder route. I understand they are campaigns/missions in development, but they are not released yet.
After the releasing of Operation Sea Lion, Monty said that there will be a future release focused on JTW. Probably some of these campaigns will be included in the future expansion.
By the way, I am now flying the missions included in Project85, in the RU folder. They are training mission for soviet naval MiG-15 in the late fifties, and I am enjoying them very much. There are two marvelous manuals in BATDOCS for those missions, too. I recommend you these missions while you wait for the Vietnam sets.