API shows apparently wrong qty for combination

[thomashygum]

Customer have a combination 3638. Backend says quantity is 1, but API says 0, isn't that an error?:

 

1) id 3638 in backend: http://tigerweb.dk/tools/dev_screenshots/Products%20-%20PrestaShop%E2%84%A2%20-%20Chromium_014.png

2) id 3638 via API: http://tigerweb.dk/tools/dev_screenshots/Selection_015.png

 

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Installation info:

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