When Annie and Taylor arrive on the farm, they stay in one of Mary's guest rooms. Later in the film, Annie and Taylor renovate an old tack room to live in and there is no mention of the guest room.
in the scene where Annie is first riding Red, when Mary Lou walks up and Guido says "Look at that half-pass", the horse is in fact doing shoulder-in.
when Annie rides Tolo in the Musical Freestyle Championship, there is no music. she is also not riding a test of her own creation incorporating the Grand Prix movements and set to music, she is riding an existing Grand Prix test, which would disqualify her from a Musical Freestyle Championship.