End of Post selected, ad appearing on header too

I have switched to a new theme and now ads appear in the header too, breaking the menu.

I have only 1 ad setup at End of Post.

This is the GoogleAds code I use (I removed client and slot numbers)

<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- Poiimata -->
<ins class="adsbygoogle"
     style="display:block"
     data-ad-client=""
     data-ad-slot=""
     data-ad-format="auto"
     data-full-width-responsive="true"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>

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