An unidentified, unscored section that does not count toward a score

An unidentified, unscored section that does not count toward a score may be included and may appear in any order after the Analytical Writing section. Questions in the unscored section are being tried out either for possible use in future tests or to ensure that scores on new editions of the test are comparable to scores from earlier editions.

What does the bold sentence suggest?

Questions in the unscored section are included for one of two reasons:

— to check that they are satisfactory, prior to possible use in future tests
— to ensure that scores on new editions of the test are comparable to scores from earlier editions (i.e. to check for consistency of scoring)