It says i have unread chapters that don't exist. Can someone help?

okay story idea based on the new (very spoilery) trailer for the Equestria Games episode, I'd like feedback, please: Rainbow Dash and Spitfire are very close friends, but when Spitfire very narrowly but noticeably beats her best friend in the Equestria Games relay race, the two very competitive mares have a falling out. Can Soarin help them fix their fractured friendship, before it's completely destroyed beyond repair?

I read a story where twilight visits shining armor and cadence's house, and at the beginning twilight debates whether she has to knock or not, and at the end shining armor gifts her with a key to the house, giving her her answer. I think it might have been a mature story but I can't remember. EDIT: found it! finally.