In my application I have a chart that I reconfigure with different series at runtime based on drill in like actions. When you call chart.setSeries, it hooks up the new series, but the old ones fully destroyed and still show up in the chart.
Thanks for the report. I do not think this is a bug as I do not believe that that is the intended purpose of the destroy function. With that said there is a feature request open to, TOUCH-3813, to make it easier to change the series on a chart.