conditional logic?

I have posts in 7 categories, and am using your plugin to restrict Recent Posts (in the sidebar) to the category assigned to the post. But when there are two or more categories assigned to the post, I get multiple widgets showing in the sidebar (Recent Posts duplicated for each category the post was assigned to). Is there some kind of logic that says, if more than one category, just use the first one to display the widget? thank you!!

https://haasnewsroom.wpengine.com/brexit-expert-panel-gathered-berkeley-haas-explore-whats-next/