Chart setting in email

Hi all,

I have created a dashboard like example of dashboard of sales in standalone report designer as shown in attachment. So in my dashboard all chart setting disturbed when i send them via email in report designer. But in example of Sales Dashboard all charts are remains at the same place  when i clicked on print preview.Can you tell me why my dashboard charts disturbed means going up or down (Changes their place)  during sending them via email.

please tell me how I can fix my chart during sending them in email.