When filtering on Account managers, keep in mind that some companies have multiple account managers.

For example, if Anna and James are both account managers for a particular company, and you choose to exclude all companies managed by James in the Report Centre (Exclude selected), any company where Anna and James are both listed will also be excluded.

The same company is included if you select only Anna without excluding, since Anna is one of its account managers.

When a widget is grouped by Account manager, a company with two account managers is counted under both of them.

The Company categories and Company campaign filters work the same way: excluding a category or campaign removes every company that has it, even if the company also has other categories or campaigns.