The payments report is an union of sales revenue, payments and costs. This is currently just a view, it does not offer functionality to drill into the row.
If you want to see payments only you should just use the payments / advances menu item instead of this option. This is a detailed drilling into payments but the search on the normal screen will generally find what you require as it searches both title and payee.
Path: Sales / Royalties > Royalties Reports > Payments
When select Payments from the main Royalties Reports you will be taken to the screen where you can see the list of all your payments:
You can filter your payments by Book Title, Contributor, or for a particular period if you select dates in From, To boxes, or by Type if you check correct boxes Return, Sale, Adjustment
To download the report click on Download XSL