I don't think there is a problem to solve anymore... you likely have selected the menu option to show N/A styles. If the style appears as N/A (Not Available) then you wouldn't be able to load it. It's just a style that the program knows about, but you don't happen to have it. The style categories that you listed all make sense as styles that you wouldn't have - so I would recommend just selecting Other --> Show only styles that are available.
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