Bar chart with datetime xaxis displays wrong labels

[cmeelker]

Description

When using the datetime type for the xaxis of a bar chart, the labels behave weird if there are only 2 or 3 dates provided as categories.

Steps to Reproduce

 var options = {
    series: [{
      name: 'PRODUCT A',
      data: [44, 55, 41]
    }],
    chart: {
      type: 'bar',
    },
    xaxis: {
      type: 'datetime',
      categories: ['01/01/2011 GMT', '01/02/2011 GMT', '01/03/2011 GMT'],
    },
};

Expected Behavior

Display 3 labels, one for each category/day.

Actual Behavior

• Displays more labels than the total amount of categories.
• Displays times where dates are expected.
• The labels are not positioned correctly below the bars.

Screenshots

Reproduction Link

https://jsfiddle.net/c7ah2qr6/1/