The FastGuns are adjusted properly per your picture and description
The upper StableLoads are engaging your upper overload spring on one side, but the truck is not sagging enough yet to really engage the other side of spring. This spring is progressive and designed to engage the rear side and then engage the other as the load increases. It may sound counter intuitive, but your stability will increase with more load on that spring.
Your lower overload spring does have less gap than mine. If you lift your truck up by the receiver to let the suspension droop down, you can clamp in a plastic felling wedge or even a a wooden wedge block to see how the lower StableLoads would feel. Once you lower the camper back down on the suspension, the main spring pack will have greater preload. If you like the result, get the other StableLoads that allow easy engagement/disengagement rather than having the preload fixed.
