Level 7 Requirement is NOT a handstand, but just below it. Level 8 is a handstand.
This is a difference between the SR (cast 45* above) and the execution deductions for casts that are short of handstand. For L7 and 8 depending on how far below handstand the cast is, the cast is getting an execution deduction. However if there's one cast 45* above in the L7 routine, then they won't lose .5 off the SV for the SR. But if the highest cast just meets that minimum they're going to get several tenths off on every cast. Level 8 doesn't have a casting SR...but they do need two more Bs so some L8s might need their cast handstand as a B.