Some settings cannot be changed

[Optay]

Some settings do stay where you put them. It is possible the values are changing internally, but the presented value is not.

Change the score assigned for a bye (settings -> pairings).
Navigate to another top-level tab (players or pairings).
Return to (settings -> pairings).
Score for a bye will have reverted to 1/2.

This also applies if the settings are changed and then saved as a template. Contents of the template have not been checked.