from WP:Talk: 
 :Section headings: Because threads are shared by multiple editors (regardless how many have posted so far), no one, including the original poster, "owns" a talk page discussion or its heading. It is generally acceptable to change headings when a better header is appropriate, e.g. one more descriptive of the content of the discussion or the issue discussed, less one-sided, more appropriate for accessibility reasons, etc. To avoid disputes it is best to discuss a heading change with the editor who started the thread, if possible, when a change is likely to be controversial. It can also sometimes be appropriate to merge entire sections under one heading (often preserving the later one as a subheading) if their discussions are redundant. In order to ensure links to the previous section heading (including automatically generated links in watchlists and histories) continue to work, one should use one of the following templates to anchor the old title: {{formerly}}, {{anchord}}, {{anchor}}. 
 I hope this helps the editor who started this section understand why section header was renamed.