Yes, that's a real screenshot after 10 years of unsupervised plone usage of the "Subject" field.
I'm slightly re-imagining the interface for Products.PloneKeywordManager so we can get a handle on this.
It's a work in progress at the moment.
I have an opinion that if we add pagination to the keyword list we can get rid of the "View Range" filter on the keyword manager form. But if anyone is using it and has a different opinion, let me know.