Do you still have checkball 4? If so, remove it and retest. Same with checkball #2...remove that too.
On my setup I have 4 checkballs in the case and 2 in the valve body: 4 in the case are #3, #6, #9, and #10. On the valve body I omitted the center one #8 for a firmer 1-2 shift.
Also, what...