When a correlation is used and there are not always values for all elements of the correlation, you have to deal with "Unspecified" in the report. While it might make sense for some reports (did not find anyone to far) it destroys reporting of many others. The totals is wrong as well as the chart is useless since Unspecified makes >90% in most cases.
E.g. if you have a variable to store a business unit (prop1) and have a 5 item-correlation (prop1, pages, downloads, exits, keywords)
The breakdown to see all exits for a single BU, will count all (page+download+keywords)-instances as "Unspecified".
No standard user can understand "Unspecified" here.
Or even easier, if you have a correlation Pages<->Keywords, you will see any PageViews without a keyword as "Unspecified". Makes sense?