If using itemtypecat, the itemtypes are grouped into categories for Advanced Search. However, in Refine Search, the item types listed are actual item types rather than the item type categories. The same seems to be the case in opac-detail. Either showing the category instead of the itemtype if itemtypecat is being used, or providing a toggle to allow it, would be more consistent and allow libraries to use fine-grained itemtypes without having to present them all to library patrons.