Thank you for taking your time to answer my questions. This workaround you have is not ideal because the date labels are duplicated (once for sales, once for profit). Is there a way to just show one date per year?
You might want to think about why the numbers are along the top (its a mobile devices compatibility thing) in the first place. They are there so you don't have to scroll down or use the pinch controls in order to discover what the axis is.
Try to think of it as a feature, not a bug.