Why do some ASINs appear multiple times in reports?

If the same ASIN appears multiple times in MerchantSpring reports, it is usually because the product is associated with multiple SKUs within the seller’s catalog.

Amazon allows sellers to create multiple SKUs for the same ASIN to manage different inventory or fulfillment configurations.

MerchantSpring reflects this structure in its reporting.

Common Reasons an ASIN May Appear Multiple Times

Multiple SKUs for the Same Product

Sellers often create multiple SKUs for operational reasons, such as:

• Different fulfillment methods (FBA vs FBM)

• Multiple warehouses

• Listing variations

• Regional inventory management

Each SKU may be associated with the same ASIN.

Product Variations

Some variation structures (size, colour, bundle variations) may share the same base ASIN relationship, depending on how the catalog is configured.

Marketplace Configuration

In certain cases, sellers may create duplicate listings or variations for the same product across different marketplaces.

Each SKU may appear separately in reports.

How MerchantSpring Displays This Data

MerchantSpring displays product performance based on the identifiers provided by Amazon.

If multiple SKUs map to the same ASIN, the report may show separate entries for each SKU.

However, many reports allow users to aggregate data by ASIN for a consolidated view.

Notes: 

• SKU-level reporting is useful for operational analysis.
• ASIN-level aggregation helps identify overall product demand.
• Filtering reports by ASIN can help consolidate duplicate entries.