Hi RR,
After taking a sample test in my own environment, it works well. I cant reproduce this scenario, and I cant find the exact reason which can cause this issue. Based on my test, when we click a link in the document map, it will jump to the report page that
displays that item. Clicking items in the document map refreshes the report and displays the area of the report that corresponds to the item in the document map. It will display the item at the top of the view part if there have spaces.
In order to narrow down this issue, please try to move the table as close as possible to the top of the report body. And please make sure that you have selected the right expression that matches the group expression. Besides, if this
issue still exist, in order to trouble shoot this issue more efficiently, could you please post both the design surface and setting of the Document map?
The following document is for your reference:
http://technet.microsoft.com/en-us/library/dd239329.aspx
Hope this helps.
Thanks,
Katherine Xiong