While writing this comment, I have gone through the entire cycle: reopened my document to find that Word has failed to preserve my changes reimposed them by modifying the style from the style panel saving the document reopening it once again. When I save, close, and reopen, the 2.75 left indent reappears. I go into the Style pane and modify nb, so that everything looks the way I want it to. When I close my document and reopen it, nb paragraphs show up with a 2.75 left indent, which makes them awfully hard to read in a table.
I have a bulleted paragraph style, nb, with a left indent of 0.25 inch and a 0.25 inch hanging indent. The specific template in use does have 'automatically apply updates' checked. I use document templates (even though they are inexplicably hidden in File / Options / Add-ins / change-the-dropdown-or-you'll-never-find-them ). From time to time I run into the same sort of problem.