First of all, I don't think you shoot with a sequence. Rod Jenkins told me they did some high speed photography of him shooting a glove at Lancaster Archery. He said if you saw it you'd never shoot a glove, puts extra oscillations in the string comparied to a tab.
Your turning your left shoulder into the bow. Take more time when you have the bow up. Two things that I'd think of (part of the sequence that I don't think you have) is one lock that shoulder down so it can't turn in. And two picture that arrow in the bull before you shoot. There's a lot of time between putting the bow up and starting the draw. Your not using it. Things speed up once you start the draw.
You could double your back tension. Your opening your fingers to release. You should use back tension to pull your fingers off the string. They should be cupped behind your head, not on the side of your face after the arrow is gone. The great thing about shooting back tension is you have no idea of when the string is going to go off.
I know your were on film, but Rod Jenkins says take 45 second between shots. I was told this 40 years ago. It not only gives your muscles time to recover, it makes you think of your last shot and the next.
If you feel the need to build a sequence in your shot send me an email. In the subject line put Shoot Along.
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