Was this the script you were looking into the float-based Sprite coordinates? 
Nah, it's another script.
What triggers the lag with XPAT?
Moving down or right seems to snap instead of slide.
Dunno what went wrong, but sometimes the game went lagg for a bit all of a sudden and then back to normal.
Player movement isn't smooth as intended.
(RTP, XPAT and smooth scroller script only)
FYI, resolution is 1024 x 540 and map is 42 x 20