Also welcome!

(where are my manners)
Just fyi, my flights ITO-HNL-OGG were two different flight numbers.
I suspect the difference is that when I booked I told the website to look for "one-way itins" ITO-OGG. And it came up with the connection through HNL.
But I too suspect, now, that if I'd constructed instead as a "multi-segment" flight instead of a "one way" flight it would have credited as two x 500 miles.
But, otoh again, I don't know if that would have upped the price or not; I suspect given HA's website and pricing structure, it would have.
Maybe
slippahs or
jtkauai or
FlyinHawaiian would know for sure.