I suggest you contact the support team directly.
Here you can find lots of tutorials and you can give feedback or request support: Customer Feedback for Vizubi
In any case, this kind of issue usually happens when you move columns (dimensions or expressions) within the chart and then you hide one or some of them.
I suggest you show all columns, then restore the original order (dimensions first, then expressions), finally hide again the columns.
Save the chart and the document , re-map the object inside the NPrinting template (right click on the table object, click on update) and and try again.
Hope this helps.