One wonders if even Eddington was a Maquis member at the time. His sympathies might have developed much later on, after exposure to the frontier environment.
If, OTOH, he was a sympathizer back when assigned to DS9, we might speculate that his superiors were in on it, rather than incompetent. In "The Search", it seems that Nechayev forced him upon Sisko - was she perhaps a convert as well? The primary Maquis hunter a Maquis herself! Toddman may have been his more direct superior, though, and the person responsible for getting him through the background checks.
Timo Saloniemi