When you are saying "on line", what site? I'm assuming Korean Air's site, but wasn't sure.
On
www.delta.com I can see flights MCO/BKK with legs on Korean Air. I didn't try the various OTAs, but suspect Korean Air would also show up on them.
At least on Delta, I've
sometimes found required mileage to be the same from a connecting city and from a gateway city.
You also can request a moderator to move your post to another forum, but
SK AAR may have already taken care of that for you.
And welcome to FlyerTalk!