Lostpedia agrees with me on the continuity screw up in the sideways timeline:
http://lostpedia.wikia.com/wiki/The_Last_Recruit
"Sun and Jin could not realistically arrive at the ER at the same moment as John Locke, as the events of "The Package" takes place just a day or two after the arrival of Oceanic 815 into Los Angeles, whereas Desmond's attack on Locke took place at least a week after, due to Desmond telling Hurley it had been a week since their flight in "Everybody Loves Hugo"."
Maybe Sun and Jin did the horizontal lambada for 4 days straight before Keamy interrupts them. Doing the deed, might have made Jin forget all about taking the package to Keamy which is why Keamy comes looking for him.
