H1 Tag is Placed as Logo in my WP Theme. Should I worry?

[2011mckinsey]

Hello everyone!
My new travel blog called followmckinsey.com is almost 6 months now. During the past several months I was working on posting good quality content and developing the presence on fb, twitter and reddit.
My Alexa rank has moved to 460k, MOZ PA to 20 and MOZ DA to 10.

After using MOZ site explorer to review my posts, I have discovered that my newly purchased Wordpress Theme uses H1 for Logo on single posts that has always been considered as bad SEO practice….

Despite the Missing H1 tag, MOZ gave an A grade to most of my posts.
As I have read on multiple sources, some people say H1 tags are important today and some say they are not…..

I’m not a CSS professional, so it would be hard for me to change the way these tags are placed on my website.

Should I still change the theme (somehow) to eliminate this “problem”?
Should I forget about it since it’s not that important?

Thanks for the advice!