Nah there is a rhyme to their reason, although it may appear like madness.
A lot of it is dependent on what is done in the lead up to the try scorer. For example, Fusitua's first try was brought on by Lino, despite him not passing the final ball. Lino danced, got on the outside of his man, causing the winger to come in. 2 on Lino, 1 on Hiku and no one on Fusi. That overlap was created on the inside by Lino.
The same could be said, albeit not for a longer run, and more work done by Hiku. IMHO, it was a 50/50.