I created a new category but it keeps disappearing?

I added something to a new category, but whenever I reload the game it’s gone. Help?

This isn’t helpful at all… If you want help, Further explain what you are talking about.

I add a new catergory for an addon item. I place the item in that category. When I reload the game (quitting or simply starting a new game) the category is not there and I ust create it again.