The guards who were hostages and became sympathetic said they'd help Sisko (aka Gabriel Bell) and Bashir escape by putting their IDs on corpses. But in the final scene we see Sisko's picture in the intragalactic Wikipedia article for Gabriel Bell. Sisko was very careful about not becoming the "face" of the uprising and hostage taking (assigning that unemployed middle-age father to fill that role) and the ID had the real Gabriel Bell's photo. So how did anyone get Sisko's photo?
Plot hole #2: If the guards put their IDs on corpses, it would've been obvious the faces didn't match, since we didn't see any corpses burned beyond recognition. Just people who presumably got shot. That would've raised a lot of questions, including the likelihood that the real Gabriel Bell escaped, and thus did not in fact martyr himself to protect the hostages, which was the historical moment Sisko and Co. were trying to preserve.