That's because you're using html code in your category description.
By default the category description is also used to fill the meta description tag.
The html code in your description breaks the format of that tag - hence the text that appears at the top.
As a workaround you can change the meta head section for your category pages:
1. Go to The Factory > Your Store > VIEWS > CATEGORY PAGE > Default > View menu > View <head> Elements
2. Remove [category.description] in <meta name="description" content="[category.description]" /> and replace with some generic text.
3. Save and update your store by clicking the Update Settings button in Datafeedr plugin.