Footer issue

Whoa, that theme code is messy!

Your copyright div is nested inside your sidebar div…not sure which file is messed up, but I would be tempted to start over from the TwentyTwelve theme. It really isn’t that much different, design-wise, and the code is clean.

You have many mark-up errors — which are likely causing that problem, in particular extra or missing tags:

https://validator.w3.org/check?uri=http%3A%2F%2Fpublishingconvention.com%2F&charset=%28detect+automatically%29&doctype=Inline&group=0

Looks like a lot of deprecated code too.

https://codex.www.ads-software.com/Validating_a_Website