I think that unless set the 'tweak' and do some of the steps discussed in the other posts, various things won't work for you. For example, the author list in the tags pane (left hand side) is probably in the wrong order. The author_sort box in edit metadata will be pink, indicating that calibre does not agree with your settings. There are other possible problems as well.
However, if you don't have many books or authors, then you can probably ignore these issues.
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