Thanks for clarifying this for us.
The second point will be addressed shortly. By the way, please note that the original targets of the 404 on listing pages were department pages, then we added category and most recently subcategory pages. You can see how these changes were incrementally added to the codebase by reading the previous responses to customers' responses. Brand and theme pages were not initially reported but of course, we will extend the fix to them as well, that's not a problem at all.
Very glad that you are happy with the out of bound pages, I was under the impression yesterday that they were not working for you.
For the last point, we will take your advice on board and make the necessary adjustments internally. As I said yesterday, the metadata issue is not related to this forum thread but of course, it will be given our full attention as it is of paramount important from an SEO point of view.
I will revert to you once the fix has been rolled out. Meanwhile, please do not hesitate to get in touch with us if we can be of any help.