confusion understanding FFT butterfly diagram?where are 12 , two input butterflies? https://www.alwayslearn.com/DFT%20and%20FFT%20Tutorial/DFTandFFT_FFT_Butterfly_8_Input.html

I was reading above link and then  i came across a confusing sentence, i highlighted it in attached snapshot. It says there are 12 , 2 input butterflies ,while i am only able to see only 4, 2 input butterflies at left most of snap in stage1  but unable to see any 2 input butterfly in stage 2 or stage 3
Please see below diagram to see the Stage 2 and Stage 3 butterflies.