Continuity mistake: When Maya gets in the car to go to the White House, she's in a blue outfit, but is in a brown skirt and pink jacket when she gets there. Despite the fact she could've changed in the jet, she wouldn't have known she was going to be on a private jet, and so would've been wearing what she intended to wear.
Plot hole: In the scene before Maya rides in the barrel race, They emphasise that Brooklyn has broken her hand, thus making it necessary for Maya to ride without any prior training, yet after they have won, and they are all jumping around for joy. Brooklyn's hand is not bandaged and she would be in an enormous amount of pain waving her hand around. Also at Mayas birthday party, Brooklyn has not bandage and is waving her hand around like there is nothing wrong with it.