I have noticed the NOL worksheet rounding differently than the Schedule D. Schedule D rounds each entry on the 1099-B (Cost and Basis) separately, whereas the NOL worksheet appears to net the transaction and then round the result.

If you only have one item on a 1099-B where the proceeds are $7.55 and the cost is $10.45, the Schedule D shows $8 - $10 for a loss of $2. The NOL worksheet appears to subtract $10.45 from $7.55 and round the resulting $2.90 for a loss of $3. The result is a NOL of $1.