You did get a somewhat better aero position. Fitters will tend to be conservative when trying to give you a more aggressive position because it takes time to adapt and decreases comfort, and people will follow up with a complaint about discomfort. Fitters tend to be quite liberal in reducing aero to increase comfort and power generation, because these will almost always make the rider feel better even if it doesn't make them faster. It also might make them faster, and going too aero might make someone slower.

The best way to get an aggressive fit is to come in with all your spacers on top of a slammed -17 stem, it basically tells the fitter you want to be as low as you can go. They might think you're a fredly poseur and they're enlightening with a proper fit with bars at the right height though.