Do you know what the modifiers with incorrect sales category are? Or you need help to figure out which modifiers do not have correct sales category set?
I guess the easiest way to debug this would be using "Advanced Properties" under menu. It's located at Menu >> Advanced Properties. Make sure you to select "Sales categories" column at the top right corner where it says "show/hide". Most of the modifiers should have inherited attribute from their parent item or group. If you want certain modifiers to have different attribute than inherited setting, navigate to those modifiers and change their sales category attribute accordingly.
