Recommendation - avoid nesting objects
Although you can import repeaters, repeater
tables, and objects in conditional blocks, list objects embedded within
list objects may cause problems due to the limitations of the target Microsoft application. For
example, the rendering of the report could result in report elements
that are hidden by outer table borders or in data that is displaced
to an incorrect column.
The report author must design reports that are optimized for your Microsoft Office integration needs. That means ensuring that there is minimal formatting so that Office users can more easily use Microsoft Office formatting capabilities with the IBM® Cognos® content.