Me: Twilight, we need to find the Crystal Heart. Rarity: But Sombra hid it years ago!! Twilight: The Crystal Heart must be up there. Come on Spike, let's go! Spike: Uh, Twilight there's - *Twilight goes up the stairs whilst Spike gets some coffee and goes up elevator* Later.. Twilight: *Panting* Made it.. at last... Spike! How did you get up here before me?! Spike: Yeah, that was what I was trying to tell you, there's an elevator.. Twilight: OH COME ON!!!
She can't teleport. She can only cast a blink spell to send you a few feet forward. I also like the theory that you can only teleport if you know exactly what the place looks like. That would account better for her teleportation in the ticket master.