I've just checked it and, you are right, it seems there is a bug there. All the products added through the search box weren't added to the new PO when created. We're going to fix this for the next version.
And regarding your variations names concern, I'm sorry but I don't understand what you mean. All the variation names are built in this format: "variable name + variation attributes". And no matter how long are their names, these are being shown. This is how I see them: