No first day at a new teaching job in Korea is complete without at least one schedule change and/or at least one unplanned-for new class. These types of things don't really bother me, actually. But it's worth noting that all other differences aside, some things are always the same, this being Korea, and all.
Jus' sayin'.
Actually, I'm in stunningly high spirits. We'll see how that pans out in the face of actual students.