After entering all the scores, you need to calculate the results.
The easiest way to calculate the scores is to press [F6]. This is equivalent of the first option "Score the current session using previous options". Where the session has not been scored previously, you will be asked to supply the scoring options.
You will rarely need the score "All the sessions using the previous options", but is useful where you want to reset all the outright scores, and make sure the calculations are correct.
Any time you want to change the options used in the scoring use the third option, score "The current session after changing the options". Changes to some of the scoring options will require a re-score of all sessions for a valid result. The ASE Scorer Version 9 detects this situation and automatically re-scores all sessions.