Can someone please explain this simple NPN circuit?

Using Arduino General Electronics
2

Any chance you are not connected to the pins you think you are?
http://61.222.192.61/mccsemi/up_pdf/BC337~338(TO-92).PDF
http://61.222.192.61/mccsemi/up_pdf/BC546-BC548C(TO-92).pdf

Like collector & emitter swapped?