RSG Ch2 P 4

I started this around 1pm and finished it just now, 1am.  12 hours and a cramped hand.  I have a problem with my layers shifting as I work, which is pretty obnoxious.  Even locked layers will shift.  Anyone know what's causing this?

Tsk, you lose Julia's shoes at this size.  This isnt the size the comic'll be in, but I should still probably thicken the white outline around her shoes or just go ahead and make them entirely white (probably the better idea).  I should thicken the outline on big Remi too.