Precisely. Damar was Dukat's aide and he was a glinn. Daro and Telle were Macet's - glinns too.
And Damar was getting promoted to a gul (after finding a way to take down to minefield). To gul from glinn, sooo... to "captain" from "lieutenant"? I have no idea who assumed that glinn was not a high rank and now writers have to follow that example.