[quote=@CAS1006]
(That and the Samurai's/WArrior's post somewhat made me go crosseyed with trying to determine the logic and positioning. ) 
[/quote]

When we stumbled across the corpses and signs of something that could've harmed the party, Koji used his 'dragoon' training to begin jumping along the treetops to catch up with the party. Considering it's known for dragoons to leap to the top of massive structures (I.E. Having the ignore height mechanic in FFT) it's assumed he can cover great distances in his leaps. So he made his way to the front where he encountered the larger creature and the 3 party members. If you ran upon the the other three that were surrounded, that means your character veered off at an angle different from Koji's.

So you can either be involved with the 3 surrounded by younger Malboros or assist Koji and the others with the larger one.