[Mailman-Developers] edited archive folder-edits lost when message posts

[Richard D'Andrea Dover]

I edited the archive index.html folder for my mailing list. I also
edited the date.html and subject.html to have the appearance I
wanted. Everything looked good until there was a post.

When a post is made to the list all my data is erased and the
archive index.html, date.html, and subject.html went back to
default.

Why is this?

How can I change the archive files to look the way I want?