Imo you need to have the left hand secure without the need to look at what it's doing, that way you can focus on the rh which is more intricate.
Imo you need to have the left hand secure without the need to look at what it's doing, that way you can focus on the rh which is more intricate. I assume the problem is missing lh notes, rather than the 9 v 6? Being largely self-taught I'm slightly hesitant to provide a generic solution, but practice the lh in groups of six until each group is fluent; it really needs to be second nature and something you can do without thinking, like a standard waltz accompaniment pattern would be. If you've got to that stage and it's still going wrong, I'm a bit mystified and you might have to try slow practice.