Even though you create a one-time or recurring report with filters, the actual report does not adhere to some or all of these filters, and shows all data instead of data for specific filtered campaigns.
This can happen if you are multi-tabbing or applying multiple filters and adjusting the grid at the same time. When you are applying your filters and clicking to view other grid pages, the filters do not get saved.
When creating your report, make sure that you make minimal movement within the grid. The best practice is to just bring in the required columns, apply the filters, apply the date range, and then create the report.