When you select View Properties in the context menu, it should open the display form of the selected discussion. Is the View Properties context menu the only one that does not work? Or the others not working either?
You can group any field you want. You can also group multiple fields. We even support complex category like in Lotus Notes:
1. Multiple categories. e.g.: Category1, Category2, Category3
2. Nested categories. e.g.: Level1\Level2\Level3
3. Mixed between multiple categories and nested categories. e.g.: Category1, Level1\Level2
However, the complex category is only supported if you have the qListForm. The Microsoft List Form won't be able to handle complex category because we create our own control to handle the complex category.
If I don't answer all of your questions, please feel free to ask more.