Cover Generator

I’m trying to publish my third PB book.

When I use the cover generator, I have uploaded my preferred cover.

The created pdf has my cover, but the generic PB design cover is there too (like a watermark).

I seem to recall that when I “publish” the book, the watermark disappeared.

But the publish step gives me a menu to add a URL address.

What am I doing wrong & how do I publish?

Thanks in advance, Steve