Adding new variations to a parent causes “Qty box” to appear (showing 9 or 0) and mismatched FBA/FBM behavior — buyers ordering FBA but checkout goes FBM
Hi all, I’m hoping someone can explain what’s happening here (or point me to where to check the root cause).
Scenario
I have an existing variation parent with some FBA SKUs already active.
When I add new variations to the parent, I sometimes see a “Quantity” box appear on the product page / variation selection.
That quantity box often shows either “9” or “0” for the existing FBA variations.
Those numbers do not match my actual FBA inventory in Seller Central.
What I’m seeing
Sometimes the quantity box appears, sometimes it doesn’t (for the same parent listing, depending on when I check).
When the quantity box is hidden, the newly added variations default to FBA (even before I’m fully confident everything has synced correctly).
When the quantity box is shown and displays 9 or 0, it seems to create a channel confusion:
Buyers appear to be selecting an FBA offer/inventory, but the order can go through as FBM (or the listing behaves like FBM at checkout).
I’m worried this could lead to late shipment / cancellation risk and performance impact.
Questions
What does the “Quantity” box on the variation page actually represent?
(Is it a cached number, a per-offer purchase limit, a “available” estimate, or something else?)
Why would it show fixed values like 9 or 0 that don’t match Seller Central inventory?
Why does the quantity box appear/disappear intermittently? Is this an A/B test or different page template?
When adding new variations, is there a known sync delay where the fulfillment channel (FBA vs FBM) can temporarily mismatch between:
Manage Inventory / FBA inventory
Offer listing
Detail page variation UI
Checkout fulfillment path?
Where can I check logs/reports to confirm what Amazon thinks the offer is at the moment of purchase?
(e.g., Inventory Event Detail Report, Manage FBA Inventory reserved, Listing Quality/Offer tab, etc.)
What I’ve tried / checked
Verified actual FBA stock in FBA inventory pages (quantities are different from the 9/0 shown).
Issue happens right after adding variations (most noticeable during the first hours/day).
If anyone has seen this, I’d really appreciate:
what the 9/0 usually indicates,
how to prevent buyers ordering the “wrong channel,”
and what to tell Seller Support (keywords, screenshots, which report to attach) so they don’t give a generic answer.
Thanks in advance!
Adding new variations to a parent causes “Qty box” to appear (showing 9 or 0) and mismatched FBA/FBM behavior — buyers ordering FBA but checkout goes FBM
Hi all, I’m hoping someone can explain what’s happening here (or point me to where to check the root cause).
Scenario
I have an existing variation parent with some FBA SKUs already active.
When I add new variations to the parent, I sometimes see a “Quantity” box appear on the product page / variation selection.
That quantity box often shows either “9” or “0” for the existing FBA variations.
Those numbers do not match my actual FBA inventory in Seller Central.
What I’m seeing
Sometimes the quantity box appears, sometimes it doesn’t (for the same parent listing, depending on when I check).
When the quantity box is hidden, the newly added variations default to FBA (even before I’m fully confident everything has synced correctly).
When the quantity box is shown and displays 9 or 0, it seems to create a channel confusion:
Buyers appear to be selecting an FBA offer/inventory, but the order can go through as FBM (or the listing behaves like FBM at checkout).
I’m worried this could lead to late shipment / cancellation risk and performance impact.
Questions
What does the “Quantity” box on the variation page actually represent?
(Is it a cached number, a per-offer purchase limit, a “available” estimate, or something else?)
Why would it show fixed values like 9 or 0 that don’t match Seller Central inventory?
Why does the quantity box appear/disappear intermittently? Is this an A/B test or different page template?
When adding new variations, is there a known sync delay where the fulfillment channel (FBA vs FBM) can temporarily mismatch between:
Manage Inventory / FBA inventory
Offer listing
Detail page variation UI
Checkout fulfillment path?
Where can I check logs/reports to confirm what Amazon thinks the offer is at the moment of purchase?
(e.g., Inventory Event Detail Report, Manage FBA Inventory reserved, Listing Quality/Offer tab, etc.)
What I’ve tried / checked
Verified actual FBA stock in FBA inventory pages (quantities are different from the 9/0 shown).
Issue happens right after adding variations (most noticeable during the first hours/day).
If anyone has seen this, I’d really appreciate:
what the 9/0 usually indicates,
how to prevent buyers ordering the “wrong channel,”
and what to tell Seller Support (keywords, screenshots, which report to attach) so they don’t give a generic answer.
Thanks in advance!
0 replies
Lola_Amazon
Hi @Seller_kSZCywEhJQQ8J,
Thanks for posting on Forums! If you haven't already as a first step I would recommend opening a case with Seller Support. When you open the case include this information:
- Provide the specific child ASIN(s) affected, not just the parent
- Include your Merchant SKU and FNSKU for the affected variations
- Attach screenshots of the quantity box showing 9/0 vs. your actual FBA inventory
- Reference the Inventory Event Detail Report and note the order ID(s) where the wrong channel was used
- Ask specifically: "Was this order fulfilled via AFN (FBA) or MFN at the time of purchase?" and "Was the fulfillment channel on this SKU changed, and if so, when?"
If you're still not seeing the resolution you need or have questions about their response, please circle back and share that case ID with me, and I'll be glad to take a closer look.
Thanks!
Lola
