and it always made sense since it felt like memorizing smaller chunks would make it easier. The thing is, when moving from first set of 8 to second set of 8, the checklist becomes twice as long when trying to make the change fast, since I have to run the checklist of 2 4 note chords as opposed to a big one. So my mind is split making sure I got the left hand right and then the right hand right (and with the memorized finger positions).
does your keyboard have sound? make sure you are checking how these things sound because what you are describing sounds frightful