Miko Mastery Glitch. NEVER GOT SKIN OR TITLE

I finished Miko’s lore and leveled him up to 15. And played a game while he’s 15. Yet I never got the master skin or the master of Miko title.
I am honestly very upset that this happened because he’s my favorite character.
One thing weird did happen a while ago. I got TWO Miko legendary gear. Which was… Weird. Does that glitch the game and prevent me from getting Miko Mastery??? Please, I need assistance with this issue! Thank you!!!