Hey man! That's pretty cool the auto watering stands work with the RS bags, definitely good to know.
As far as the plants go they look healthy overall but overwatered. Overwatering will cause the stunting you see like that. I still do it from time to time and accidentally overwater a plant. It sucks but it happens when you start in larger pots. I'd say back off on the watering and make sure they have lost about 50% of the water weight when you lift them. They look to have started flowering so you will probably get a little bit more growth if they stretch at all.
Also general rule of thumb on bottom style auto watering like that is wait for the roots to fill out as they just wont reach the water. Once the leaf tips reach the edge of the pot you're usually good to go. Hope that helps!