Hi,
1- Please, take a look at the “Screen options” button on the top right part of product page and check if the “Cost of Goods: Add stock” is disabled there
2- Please update the plugin to version 2.4.7.
I believe I was able to fix that issue for you 😉
3- There is no “Recalculate cost” button on the order edit page. If the product cost is empty on the order but the costs was set on the product page, you can simply update the order to auto fill the cost. And that’s right, you need to enable at least the first “Force costs update” option to get there. If you update the plugin I believe it will work better now. I’ve also worked on this matter
Suggestion 1: I’m not sure if it will be possible but I’ll take a look
Suggestion 2: It looks like you want a new option to set multiple costs in bulk, right?
We want to work on a new feature soon for occasions like that