Display ALL of the select list options even if a value is present
When a value is already present in an index field, popping up the menu of acceptable values only shows an option for what is already in the field! That's pretty much useless. The end used has to delete what is there before he can change it to something else.
Within the select list you should have an option called "Filtering". If you disable this option, all values of the select list will be displayed.
Does that help you?