How long did you wait between runs? Did you allow ample time for your battery to top off and everything to cool down? 0.2dB isn't unusual for a swing on the second run for the record, but it's good to know what lost you those couple tenths. All in all, you're doing well for being consistent day to day.
How much are your subs moving at your peak? Elsewhere? Will they break if you try to add more power? You are definitely well into compression on a lot of fronts here and you should definitely NOT expect 3dB gain from doubling power for example if you're just thinking of throwing a bigger amp on those, and doubling power is definitely getting into the realm of you had better plan to start breaking subs. You're also getting close to the point where you'll start to break panels and lose your rearview mirror so you have that to enjoy if you're seeking gains.
Once again, I'm happy to see people going out and supporting the organizers who support our hobby.
