It's not a matter of the rank system, but rather her career in the Guard. Gul Tarkan made some decisions and she could take it or leave it. She didn't complain though, as her rank wasn't a priority at that moment.
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew