I have Ultrapak+ and all three _Torrid tracks play correctly.

Something of a long shot as three computers involved, but wonder if it could be same problem as I faced a while back following automatic Windows update? Sound card had switched itself to 5.1 from conventional stereo. Those Realtracks recorded in mono could not be heard as were trying to play through non-existent centre-front loudspeaker. Those recorded in stereo were fine as they played back normally through 'front' left and right speakers. As a result, some Realtracks could be heard, but others not.