Inconsistent xAxis labels and incorrect plotting on line charts when some series don't have all data

[mightybyte]

Highcharts doesn't display the x axis or the chart correctly when using an x axis of type "category" and the first series does not have all the x axis elements. See this jsfiddle for a demonstration of the problem.

[TorsteinHonsi]

In addition to the fix, you also need to apply an X value for your points, as the name itself is not used for grouping into categories: http://jsfiddle.net/highcharts/N3dXB/1/