Devir has the same problem on the box, but the rules are fine too...
If you want so have fun, just check the example in 2. Placing a meeple as a farmer in The Farmers... Do you see anything wrong in this image?
The only way that the top left could be possible (that I know of) is if the red used a flier to go into the city. I have heard about portals also, but I haven't yet got that far in my extension implementations. But based on the tiles pictured, it's not possible. -