If I add a style or sub style, alter the style, like add drop caps, then apply the new style to a paragraph I can see that the paragraph style changes to what I wanted.
All well and good. However, if I save the doc, either to a new file or to the existing file the style changes are not saved. Not in the styles and formating dialog and not in the document.
Meaning that when I open the saved file again the, styleing is not in the doc and the changes I made in the style and formating dialog no longer exist. In this case the drop caps is no longer part of the style.
This is on Fedora 25 fully updated and saving to ODF (.odt).