It did appear that there were only two soldiers left behind, and Garak got the last. The Cardassians didn't seem to have seriously considered defending the abandoned station with those supermen. It was just a gesture of spite, an inconvenience for inconvenience's sake. Two combat zombies was more than enough for that; and probably the prime motivation of leaving them behind was to get rid of them as easily as possible.
Timo Saloniemi