I apologize for any inconvenience caused.
However, I'm not sure if I understand.
Taking a look at the screenshot, this is a Purchase Order. So looking at the purple notes on the right, for example, I see that Nábojnice 9,3 x 62 product has been increased from 80 to 180 units. And as I see on the items section, you have set a quantity of 100. So this increasing is correct.
However, if you would like us to keep investigating, first I have to ask you to try this:
- Make sure that you have the last update of your ATUM add-ons.
- If you have and the problem persists, try to deactivate all plugins except the ATUM add-ons and Woocommerce and check again. This is to check if there is any incompatibility.
If it doesn't work, I have to ask you to open a private ticket, and try to explain exactly which is the issue in order to try to reproduce it. Maybe a screenrecording reproducing it will be very useful.
This is the link to open the private ticket: https://stockmanagementlabs.ticksy.com/