I agree with the posts that said your horse seems energetic, use circles till she comes back the proper gait you want and mostly with the one that said slow down your riding.
Our horse need support and confidence from us as riders ( especially ENTHUSIASTIC horse I like the description I usually say on the muscle ) we give that support by relaxing and using our hands and legs working in rhythm with our horses.
Really try to feel your horses walk rhythm when she isn't strong and then when she gets strong, then use that rhythm with your hands and legs to show her the gait and cadence you want. Your horse will first have to accept your hands and legs for this to work but it will be time well spent.
Circling when she gets strong or rushes at a gait is a good way to get her to relax and let you feel her relaxed rhythm and cadence.
I have many blog posts and video's dealing with rhythm and circles to control the horses cadence on my coaching blog. Rod Miller IPHDA & NRHA Professional
Enjoy the journey that is training your own horse.