Hacking Others trying to figure out how dsi icons work and stuck on a section

[MarioMasta64]

so so far i have evrerything down from bitmap generation, palette generation, creating bitmaps, and getting the sequence data

but im not sure what im supposed to do with the duration?

as far as i can tell this is meant to be the duration for each bitmap 0 - 7 in order 7 6 5 4 3 2 1 0 right?

why are so many values 0?

if i swap it around i get this so its clear im doing it the right way:

and if i assume 0 = dont show then i get this many images

but that doesnt seem right because of how many images arent blanked out? is it really this way? if so why would they fill in so many entries just for them to go unused?

really need help figuring out how im supposed to implement duration..

also heres the data im getting from the sequence data

im not sure if im doing something wrong but im pretty sure im doing it right but dont know what to do with the frame duration