I have used a candlestick and a barchart in same page. When I changed the zooming parameters and scrolling the scrollbar, the candlestick's DateTimeCategoricalAxis display has some problem, please see the picture.
I tried to reproduce the issue you have according to the information provided, but with no avail. Please take a look at the attached project for more information. In order for us to provide you with a solution, could you reproduce the issue in the example provided or attach a sample runnable project of yours reproducing this behavior. As this is a forum thread you might use a third party web site for files upload and then share the source with us.