Board Thread:Naruto Discussions/@comment-27275251-20160614211405/@comment-734582-20160617100630

Shinden wrote: Having read the wiki page on the Sharingan it says Hagoromo was the first person to get it but I thought that was only in the anime? There's nothing in the Manga stopping Hagoromo from awakening Sharingan first. There's nothing stopping him from having Mangekyou. It was never properly explained what the hell the deal was with Madara's eyes, and why he could use Susanoo but not his MS powers, even though he could control the eyes. As far as we know, Hagoromo having Perfect Susanoo is acceptable under the rules of Rinnegan users. The rinnegan are his own and he's the forefather of Uchiha.

Personally i've think it's only logical that he awoke Sharingan and Rinnegan sequentially. It's how the Sharingan line of eyes works after all.