A) Depending on which kind of bacon you have, up to 18 strips - six strips on each drip bar. See cooking instructions.
A) It's called the drip bar storage tab. It twists on & off to hold the drip bars when storing the dish after use.
A) You simply haven't cooked it long enough. Some microwave ovens are less powerful than others, so you may need to experiment with cooking times. See cooking instructions.