Just look at all those cute little logs laying on the plywood decking… they are all notched, numbered, and ready to be set into place. They are so short because a window is close to the that corner.
I call these logs… “bragging logs”. It never fails that the man who gets to lay a corner like this will do so quickly and then brag about how great he is because he once set three courses of logs in five minutes… by himself.