Magento – How to update stock and set stock AVAILABILITY to in stock from same csv file

Have you ever change stock message with translate inline function? I think message was changed with translate inline function, check in your db entry to find this message.

Check your core_translate table or either change it with translate inline function.

Check your system configuration for values set at different store/website levels that might override your global settings.

Check your individual products for configuration that might override your system configuration levels.

Try setting a quantity to 1, purchasing a product, and checking is things are marked out of stock. (i.e. the products you see may have been explicitly set to be in stock with a quantity of 0 before you made your change. If this is the case and the system is otherwise behaving, I'd try setting those products to be out of stock manually)