Hi Juliet,
What is the data type of the field that placed in the Category group area of the chart? If the Weeks are numeric values, please open the “Horizontal Axis Properties” dialog box, set the “Axis type” to “Scalar (Numbers/Dates)”, and then set the “Interval
type” to “Number” and “Interval” to 1.
If the Weeks are date values, please open the “Horizontal Axis Properties” dialog box, set the “Axis type” to “Scalar (Numbers/Dates)”, and then set the “Interval type” to “Weeks” and “Interval” to 1.
If the issue persists, please send me the files to sqltnsp AT Microsoft.com (Please replace AT with @) or upload the files to skydrive.live.com so that we can make further analysis and help you out.
Regards,
Mike Yin
TechNet Community Support
