FreeSpace 2 "Sci-Fi Sim of the Year Edition" Templar Campa..

I never tried this campaign till now. The second mission seems
to be impossible to complete. I disable both transports, and Zeta 1,
and 2 are deployed, but only one Zeta transport shows up, then all my
wingman get killed quicly, and even though mission control says that
the hostages are safe, and that I need to make a clean sweep of the
enemy, one of the Zeta hostage transports end up dead, and the enemy
destroyer's damage never goes past 1%. This leaves the mission
incomplete. Is this a bug in the campaign?