I will only speak on the shots in the dressage saddle.
It looks like that saddle might be too small for you, no? Your knee is almost over the knee rolls and somehow it looks like you can't find that spot in the saddle where your seatbones are "home". That may be a factor for why your ARE rolled onto your pubic bone too much.
Try so work just walking and while horse is going along nicely, really think about plugging your seatbones in such that they point STRAIGHT down. Think aobut your upper body riding not your horse, but your own seatbones. In order to not fall off those two little points , you have to be balanced right over them, the same way a circus performer, who carries a long stick balanced on his palm can keep it from falling as long at the top of the stick is perfectly over the bottom of the stck. Ride your own pelvis.
While you do this , think of your elbows as riding right over, I mean kind of hovering over, your hips. Then, think of your heart as breaking the air FIRST as you go forward. When you get this, breathe, enjoy and know that you will need to recapture it over and over again as you move. We all do.
I love how you look up, and seem to be having fun!