In amCharts column chart, labels on category axis are alternately hidden when user reduces the browser width.
Please refer JSFiddle in the comments (When the JSFiddle output box is dragged inwards, amCharts starts hiding alternative labels on category axis as shown in screenshot above).
How to disable auto hiding of labels on category axis? Requirement is to scale down the chart (without hiding any label), when user reduces the browser size. This issue occurs when you add more columns beyond certain count.