SEMRush flagging Twenty Twelve source code for H1s

Hi,

I get warnings from SEMRush on all of my posts stating there is more than one H1 tag. I do not add H1s since the title is by default an H1, as in many WP themes. I asked SEMRush to explain the flags, and the rep there sent me a video of my source code. It showed that the code makes H1 into a class that uses the title as a name.

Is this even potentially something to worry about, SEO-wise and if so can I fix it somehow? I wouldn’t think so, but I wanted to check with you. I notice the title is repeated other times in the code as well (5 times).

I’m pretty skeptical of some of the flags from metrics sites, but they are there. Thanks.