Classification Importer

I've used classification importer to reimport the tab files and in one one of the attempts, I ran into this issue where one of the current classifications(classification #2) got grouped under another classification (classification #1) as seen on the photo on the left. Is there a way to delete classification #2 from classification #1? I'm not sure how it got there in the first place. 

For reference, I've also provided how classification #2 looks like. There is no further categorization within it. It's either grouped in classification #2 or it's not and will be bucketed under unspecified. 

Any help is greatly appreciated. Thank you!!