Category field is locked but appears differently on franchise

Hi,

I have category field locked in a listing. On the franchise listing form, the field does not appear which is expected, since it is locked.

However, the sub-franchise is listed in a different category from the main listing. In fact, it shows the category the main listing was originally categorised in (Uncategorised). However, it was after I changed the category from Uncategorised to Postal & Payment Services that I created the sub listing.

Could you take a look please?

Thank you!