Here is a reply from our dev:
"As we said before to this user, WC Orders only appear in the original language (and they don't have any translations), and the same thing happens with ATUM orders. To create the orders in all the WPML enabled languages will complicate logic too much."
As you can see Steven this is how WC works and we need to keep it that way.
To your next issue, here is the reply from the dev:
"There was a little bug when "manage stock "was automatically set from ATUM settings. WC set stock to 0 and ATUM didn't (so it was left NULL).
I fixed that (now stock is set to 0 if it was previously NULL) and for users that might have the same issue, since next update, if the stock is null, it will assumed as 0 in ATUM Orders"
Please, wait for the next release 1.5 for this to work.
Hope this helps.