Rest of the categories not showing in backend

Hi, on my site I have a category (Brochure) with 112 subcategories (pages of the brochure; 1-2, 3-4, 5-6, etc.).
But only the categories 1-2 until 124-125 are showing in the backend and not 126-127 until 224-225.

Products in this missing categories are visible in the frontend with menu item products listing but I need to get acces to these categories because sometimes I need to change the order of the products in those categories.

I already tried Rebuild categories and Check Database but with no luck.
How can I display the rest of these categories?

Thank you

Hi Nicolas,

I have Hikashop Business 4.4.3 but my licence is expired so I can not update for the moment. I want to wait until my new website is ready (I'm testing on a sub domain now).


Unfortunately Rebuild did not help. In fact I have one less category to show now. First it was 124-125, see previous attachment and now it goes until 122-123.