The aircraft shown flying mid-air with Ann and Alan going to Washington, D.C. and the one landing are different planes. The one flying is NC16001, the one landing is NC33651. Note the different tail on the one landing that says "Buy War Bonds".
When Ann is speaking with Alan Garroway by the fireplace, she has her hands together with fingers touching and resting on the ottoman. On the next cut after she says "tickled pink", the orientation of her arms has changed. Her left hand is now grabbing her right wrist.
When Ann finishes trying on dresses, she is about to begin removing the headpiece. But on the next cut when Mrs. Foster's voice is heard, the headpiece is completely off.
Middleburg, VA has no mountains, cliffs, or waterfalls. It's all flat farmland for raising horses.