Hi Luis,
You have not chosen a stacked chart type. So your data is just one in front of another. However, your data is not laid out right for a stacked column chart.
You will need to change the way your data is laid out.
Check out this new sample to see what I mean. Alternately, I have changed your original chart to a Text Horizontal Axis so that you can see what it looks like when you don't Excel thinks your axis is individual values and not dates.
Attachment 257940
Let me know if this helps.
Steve=True
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