Maybe Lyra isn't an anthropologist

I know most bronies see Lyra as an it anthropologist due to her sitting as a human in "Dragonshy". But if you think about it ponies have been sitting that way more and more often as the series progresses. The students desk have human-like chairs and the students sit upright on those, if you count leaning against something AJ (Lesson Zero, The Last Roundup), RD (Read It and Weep, A Friend in Deed), and Pinkie(Return of Harmony) have done that, In "Games Ponies Play" at least AJ and Twilight sit upright on the train. Tell me what you guys think if you can disprove my theory or even if I have you an interesting headcanon. I look forward to hearing from you.