Affiliate Reporting: Remove Subtotal Rows Before Aggregating Exports

A campaign export may contain detail rows alongside subtotals and a grand total. Summing every numeric row can count the same activity more than once. Before using an export for performance marketing media buying decisions, establish which rows represent independent observations.

Identify the level of each row

Keep the original file unchanged and work on a copy. Inspect the report settings and group labels. A blank campaign identifier might indicate a summary row, but it might also be a missing identifier. Do not delete rows solely because a cell is empty or contains the word “total.”

Add a review classification such as detail, subtotal, grand total, or unresolved. Use the export documentation and the report's grouping structure to support that classification. When the row type is unclear, resolve it before relying on the affected aggregate.

Use one aggregation level at a time

In a hypothetical export, Campaign A reports 40 clicks and Campaign B reports 60 clicks. A summary row reports 100 clicks. Adding all three produces 200, even though the two detail rows contain only 100 clicks. The summary is a cross-check, not another independent campaign.

The same issue can affect additive amounts such as spend or reported commission. Rates require separate treatment: calculate a combined rate from the compatible underlying counts rather than summing displayed percentages. Check that units, dates, attribution basis, and reporting scope match before comparing numbers.

Reconcile without forcing a match

• Sum only the detail rows within the intended report scope.
• Compare that sum with the corresponding supplied subtotal.
• Record the difference and inspect filters, hidden rows, rounding, and export definitions.
• Leave an unexplained difference visible rather than inserting an adjustment to make it disappear.

A mismatch does not automatically mean the detail rows are wrong. The supplied total may cover a different scope or use a different calculation. Conversely, matching totals do not prove that attribution or order approval is correct. This check addresses aggregation structure only.

Keep an audit trail for the next export

Save the report date range, selected dimensions, source filename, and row-selection rule with the result. If an export format changes, check the structure again before reusing the rule. Retain unresolved rows in a separate review view so they are not silently lost.

For teams handling ecommerce CPS offers or virtual-product campaigns, distinguish reported commission from settled receipts throughout the analysis. Removing a duplicate subtotal improves arithmetic; it does not establish payment status or campaign profitability.

This is a useful preliminary check for affiliate media buyers comparing sources. Make the row population explicit before discussing which campaign deserves more traffic.