Frame advantage question

Landing a LP sonic boom is 10+ for guile… then why is it that in the corner, i can’t connect a cr MK (7 f) after I connect a cr MP xx SB?

I can sweep, so 6 frames is allowed, but it is definitely no 10 frame advantage after a cancelling the SB from a normal… otherwise the crouching MK would connect. Im trying to perform a jump in HK, cr mp xx lp SB > target combo.

Cant connect it.

Why the reduction in 4 frames?

It works for me

i’ll try it again, maybe my execution is off