title: Extra point getting highlighted when hover
body: <p>I have a line chart using chartJs for this.
  as follows 
  <a href="http://www.chartjs.org/samples/latest/charts/line/multi-axis.html" rel="nofollow noreferrer">http://www.chartjs.org/samples/latest/charts/line/multi-axis.html</a></p>
  
  <p>When I hover on one point of red line blue line point gets highlighted too.</p>
  
  <p>Is there anything I can solve this.</p>