Added some stock for product but can't see it

I’ve updated stock of product https://www.tindie.com/products/25440/ with 11 units, sold 2 and then stock is again 0.
¿what happened?

Hey taviens,

Tindie is a marketplace that sellers feature their products on. Because Tindies does not make, keep stock, or ship products, they cannot answer many specific technical, stocking, or shipping questions regarding them.

The best way to get your question answered is to go to the product page and click on the “contact” button for the seller. It is on the right side of the page under the store information or just use our How do I contact a seller? and follow along.

Please let support know if you still have trouble contacting the seller at support@tindie.com.

Best,