Multiple categories link manager - won't show above 253

I have created category id 254, went to Multiple Categories Link Manager, and category id 254 does not display. I created another category with id 255 and it doesn't display either. What's up? Do I need to increase the limit in the code somehow? I increased the display columns from 3 to 4 in the config.

Until a Category has 1 or more Products in it, it will not display ...

Ok, got it. I see it only reads the categories off the products_to_categories table. That would makes sense except that it doesn't display empty categories, as you note. Wouldn't it make more sense to read the categories table and display empty categories too?

It was designed this way to not show a bazillion empty Categories on sites not using them all ...