There are only two correct answers. Do not ignore this estimate, feel free to ask the broker about the fees. While there may be errors in estimations of other fees, the lender knows what their fees are. Give yourself extra time at the closing. This give you the ability to refuse and dispute these extra fees.
Time is the biggest weapon that the dishonest lender uses to cost consumers more money.
If you are called to come in and sign the loan papers, do so as soon as you can, even if the closing is scheduled for a week later. You'll have two sets of papers. You can write on your copy and make notes for questions. Go ahead and sign the others, you still have time to cancel. If you are buying, the loan will not close until a day or two after you bring in your money.