The Table of Contents link should just be to the heading on the page, which is the name of the chart. I don't know why it is bringing in the whole chart.
1 Answer
You have probably accidentally styled the chart as a heading (the table of content will include all headings to a certain level).
To correct this, select the chart, apply the normal style (Cmd-Shift-N on Mac, Alt-Ctrl-N on Windows) and update the table of contents.