Background: The issue is on a Vista system running Office 2007. The user is
creating an excel workbook with 5-7 worksheets. The 1st 2 worksheets have
1000 - 6000 records, the rest of the sheets are graphs and charts that are
created from those records. In one of the charts she is creating a dot
diagram which has 1000-6000 dots plotted on it.

Issue: The spreadsheet with the graphs are changing each time the document
is closed and reopened (dots are changing locations) and the workbook is
constantly becoming non-responsive.

Please advise on what could be causing this issue.

Thank you.