Mt return address on the back is bolder and easier to read. I the return address just grabbed the attention of a machine or a person - and while your address is pretty clear - the style of the letters is atypical.
I can see that, but this one is postmarked on the front, so I would have thought the machine would have read that side. Another unsolved postal mystery - but nice for me to get 2 envelopes.
Maybe it is too dark for an envelope. Or maybe it encountered a vegetarian postal machine...
Ha! Maybe :)