I tend to use XY scatter charts (with a value X axis) in my work rather than column/line/etc (with a category/text axis), so I am not as experienced with these column charts. However, what I have seen when I have used them -- Excel does not like a different category X axis range for each data series (like it does so easily for scatter charts). What I have found that works best for column charts (and others with a category axis) is to have a single range/column for all of the x axis data. To get different series, use separate columns (with appropriate blank cells) for the y axis data:
The first column of this range is then used as the category x axis range for all of the data series, and each column is used for the values range.
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