Chart Data Table formats not working
If you like Pivot Tables, you will also be using Pivot Charts and, because they add information, you may also use the Data Table feature which shows the actual numbers below the chart. The problem relates to the Data Table number formats not working. If you try and custom format the numbers it ignores it and if you have numbers in millions it seems to only differentiate the first thousand.
For more on how to fix this watch the video.