phwew!!! The files are NOT corrupt, and they are working just fine, as Ubisoft intended them to...
The problem lies in the way the game handles Waypoints and terminations, in that Waypoint 67 is off the coast of Borneo, and Waypoint 68, the termination location, is off the coast of Indo-China. The game sees that a group is past the 2nd to the last waypoint, and begins to terminate the group, and that varies between 20 and 100 km off shore, instead of where the termination is... All of the "short" paths that I saw in the South China Sea are submarines... wow! I need new glasses. Anyway, the "fix" is in, and we'll gather a few things together for a small topper for what you have, with additional waypoints added that will allow the groups to come all the way back to and along the coast of Indo-China and / or the Philippines, and / or Formosa and / or Japan and / or ... blah blah blah blah blah... Thanks for the good report again don1reed!
@ KaleunMarco: did you happen to attack a 3 Cruiser group with 2 DD escorts, that sail from Camranh Bay down toward Saigon? A CL Isuzu, a CA Furutaka and a CA Takao??