Hi cldsk,
There is a huge number of possible combinations of menus in MenuBuilder, so I obviously haven't tried them all out, but of all those that I have tried, I have found them all to be properly customisable.
If you were to let me know the menu presets that you selected when you created the menu, I could recreate a similar one and have a look from this end to see what you would need to edit to make the adjustments you need from inside the MenuWriter interface.