You can only equip one preparation per category (building). You can't take, say, 2 lockered items in there, but you can take a lockered item and an item from the blacksmith. And a potion from the witch. And so on.
I asked if it was hacked, not pirated. There's a world of immense difference there, and not just in legalities. I was honestly curious if he had modified the game in some fashion to restore the five potion belt the Beta had at the point I last played. A fifth potion changes all kinds of equations.