I does look as though the AAO final is almost directly underneath the IAB final.
At the 09:05 mark on the 0300-0300Z "KICT Approach (East)" archive, you can hear the flight checking on with approach. They get cleared direct to WITBA, then at around the 12:10 mark they are 25 miles from the airport and cleared for the RNV GPS approach to runway 19L with the restriction to cross WITBA at 4000 feet.
WITBA is directly on the approach course to runway 18 at KAAO around 6.6nm from the threshold. It's interesting to note that the 4000 foot restriction at WITBA puts them well below a standard 3 degree glidepath for runway 19L at KIAB, but would be very close to the correct glidepath to runway 18 at KAAO.
So as they turned final over WITBA at 4000 feet they would have seen a runway directly in front of them with a PAPI showing them very close to a correct vertical profile. Also if WITBA was coded or entered at 4000 in the FMS their vertical deviation indicator on the Primary Flight Display would have shown them on the correct profile at that point.
Once they landed on runway 18 it appears they stayed on the runway and it also looks like one plane landed (Cessna Conquest) and one plane (Beach Baron) took off on the same runway, apparently before they figured out the B747 was even there !? Note the comment to Tower about a light twin aircraft that had just flown over top of us. The airport was then closed shortly after causing a Starcheck flight to divert.