Hiya Stuzbot,
It sounds like your using one of our legacy accounts (also called "old user account"), which are unfortunately hardly being developed anymore. Here, we've replaced the designer due to convenience, but regarding general UI / UX, we no longer develop the old interface. It is only maintained.

We have launched new, updated interface already in 2016 - if you wish to use it, feel free to just make a new account :)

You enter the metadata just once, you can bulk edit products and publish items easily in both your shop and the marketplace. Maybe that's exactly what you're looking for?

Cheers,
Sara