Q. Why is there pulp under the auger and jammed in the pulp chute?
Having some pulp under the auger and in the pulp chute is completely normal. This is how the pulp exit was designed to make sure pulp continues to exit no matter how much you juice (even though it may seem "clogged"), as long as pulp keeps pushing out of the pulp chute (might slant to the side - very normal) it's completely normal.
Please see this video about pulp design.