Created attachment 118085 [details] Document showing the problem In the attached document, the heading number is 11 and I can't find any reason why: that's the only line in the document, and the numbering is set to start at 1.
Created attachment 118089 [details] Outline and numbering box Hi @Milan, thanks for reporting. Seems the issue is that in the Outline Numbering there is as Separator Before 'Chapter 1', for you comment 'Chapter' is enough. Resolved as not a bug.
Ah, silly me. I swear I have experienced real bugs, but apparently the only one I could create a simple test case for wasn't real... :-)