This is a SurveyUSA poll. IIRC, their accuracy and credibility are questionable. The other polls show Kobach pulling away (cited in the article). I saw this poll which also had Roberts and Brownback losing in the Topeka Capital Journal this morning. My first thought was the MSM creating a story keep the morale of the Democrata up.
If that was their purpose then you think they'd rig the poll to put Roberts and Brownback slightly ahead. That way they'd encourage the Dems and the Independents and the moderate Republicans that they need to get out to the polls.