It is almost impossible to help without a link to the site.
You #colophon ul/li rules will apply to everything in the #colophon, not just the menus. Change them to #colophon .wvrx-menu ul, etc.
The hover rule should be #colophon a:hover – needs the :.
The changed theme name is intentional to help track when you’ve changed settings.
Any theme rules about centering and extending the footer would apply equally to ALL generated pages, so anything broken on the blog page would be custom CSS.
Are you using the default blog page, or a Page with Posts? It is highly recommended to use a Page with Post as all options apply the that page, while the default blog (index.php) only uses global options.