It's normally easier to install the sink first, and then start to connect the drains.
The AAV should have been close to the wall, before the wyes for the p-traps. It was installed backwards before.
The dishwasher drain could have been installed to the upper inlet of the disposer. If you move to that drain location, remember to knock out the internal plug on the disposer. The DW drain should either by high looped, or have an air gap before it connects to the drain system (or disposer)