I figured out why the charts get messed up. With the new version of NeoFeedPro_Lite released on 3rd Mar 2016, the user cannot populate the 'Days to load' field in the 'Data Series' window of ninjaTrader with more than 66 days for intraday data. If you use a figure more than 66 days it messes up the chart.
The earlier version of NeoFeedPro_Lite tolerated a figure of more than 66 days but it pulled 2 mths of intraday data as supplied by neotrade. It did not distort the chart if a user used a figure of more that 66 days.