I'm a 4:50 pm, as well. Arrived in Incheon, RoK at 7:30pm today their time. Let's hope it's on its way to Hong Kong and then Alaska.
I'm also a 4:50 departure (and now 7:30 Incheon, Korea arrival), but there's something weird with these scans, and I fear they're the "ghost" scans people have been seeing.
First, my UPS order status screenshot:
http://imgur.com/2fRIfYW
First thing I did when I saw the departure from Zhengzhou this morning was check FlightAware to see which potential flights our phones had gone out on. There were three that matched the 4:50 timeframe (which were all scheduled to actually go out at 3:20 PM CST, but were an hour and a half late leaving ZZ), however none of them were heading to Incheon, Korea.
I then checked Incheon's page on Flightaware after seeing the 7:30 arrival scan and noticed that the only scheduled flight from ZZ to Incheon for today was supposed to go out Tuesday Morning @ 11:00am their time (11:00 PM monday night for me here in Jersey, Eastern Standard Time, which was last night), and it was supposed to arrive at 2:06 PM Tuesday afternoon (again, their time, while that was 2:06 am Tuesday morning [this morning] for me here in NJ).
Link:
http://flightaware.com/live/flight/KAL810/history/20141014/0250Z/ZHCC/RKSI
There's another flight from ZZ to Incheon scheduled for Wednesday, October 15th at 11:00 am their time (Tuesday, October 14th at 11:00 pm, EST) which is supposed to land in Incheon @ 1:50 am Wednesday 10/15/14 EST. This flight can also be seen at the link I just provided.
It looks like there's one flight from ZZ to Incheon every day, and unless they were SUPER late getting the flight notated on our UPS accounts this morning out the door and into the sky, I fear that they may be "ghost scans." I obviously hope that's not the case, but I just want those of you who are living and dying by their phone's transit status to be prepared for the possibility that around 11:00 pm tonight we'll see another departure scan from ZZ and another arrival scan in Incheon a few hours later.
I'll share more info if I see anything I think you guys would be interested in!
--Mitch