I don't think this bug is part of the port, but the "Next in line" puzzle contains some errors. On some puzzles there might be more than one mathematically correct answers but only one of them is acceptable. This is not a big flaw, but there exists some real errors as well. Atleast I've found one or two flaws where you had to factor the given values with a number, but one of the calculated values in the line was incorrect. Therefore I assume that the puzzles are just saved strings and not actual calculations?