Our qChartView supports only one value of XAxis but I think that you can accomplish wat you want using the Stack chart capabilities of it.
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See a sample here http://communities.quest.com/message/35481#35481
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Also qChartView multiseries could be an option for you.
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If you still have questions or need more help please attach your list with data (it doesn't have to contain real data), qChartView configuration and a screenshot of what you want the Chart to be like (from Cognos or any other tool).
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