By the way, the default mapping for LP is X, and for LK is A. On this forum (and in the PC version), we rely solely on what button is mapped to that action instead of what the defaults are on that System. I'm sure you already know the buttons, but I'd want you to be extra sure.
LP is X
LK is A
MP is Y
MK is B
HP is RB
HK is RT
A1 or Assist 1 or Ensemble 1 is LP+MK or LK+MK by default
A1 or Assist 2 or Ensemble 2 is MP+HK or MK+HP.
TH or Throw or Grab is LP+LK
I hope this is informative to you