While I want to see you bring your lower leg forward, you seem to have a nice secure position. One that won't be easily shaken loose. You are on the right track, here.
The one flat picture worries me, though. You seem to have restriicted the horse too much, causing her to duck behind the bridle to escape the pressure (rollkur like). I hope you don't think this represents a proper frame. She needs more forward, and less restrictive contact. The other flat photo shows a good hunter-like frame, but for dressage, she needs more forward and more constructive
I hope this all makes sense to you.