I think that Mata-Nui did not creat the kaohi, the Bahrag the Krana, or the rahkshi whatever they have
(I think) When Mata-Nui discovered Mata-Nui, tere was a power struggle among the Golden Beings, for the islands control. Mata-Nui came out on top. That didn't stop
other beings from exerting influence over the island. So one family of the totesmic lords (Vahi, Miru,Akaku, Kaukau,Hau, Pakari and Kakama) created masks from there own image and name, to siphon off a bit of loyalt. likewise with the Noble masks. Mata Nui took these as offerings. G.B. Inga created the Krana, pared with Arsaj , to creat the Machinese. Rahsi are unknown. Mauta, hiwever corrupted many Kanohi & all Krana, to try his own grab at powere.Any suggestions or ideas?

For my theory, similar to yours, see my Epic "The Beginning."

I think the Kanohi formed naturally on the island, but the Bahrag created the Krana. Then, the Krana evolved into small creatures, which later evolved to wear the Vahi, and then the other 12 original Kanohi. These evolved into Matoran and Rahi.

This is a good theory. I like it when people make up theories that I know isn't true but it makes sence and it is kind of like a story. It also give you something to work with.