Actually, this is the first read flag for me. I can't imagine an experienced publisher agreeing to this unless they had already worked with you in an art capacity in the past. There is no way in the nine hells that I would hand over all marketing materials and website art to the author. Most publishers are very careful about their own brands, and turning over creative control in this manner puts their brand at risk if your vision for your specific book contradicts the company's overall brand. For example, if the company normally does subdued covers and you come up with a hyper-sexualized one (not that you would, but just as an example.) Or if the marketing material all shares a similar theme and color palette, and you come up with something completed contrary. Also, the PA has a point about the cover artist getting conflicting information. The cover artist is ultimately responsible to the person who cuts the check. As a publisher, I don't want the cover artist to be in a position where they are being told one thing by me and something else by you.RMHuffman said:"Author shall serve as Art Director for all visual materials created for the Work, including cover art/design, interior artwork, website art and other marketing materials."
My assumption is that the PA is probably not privy to your actual contract. So arguing with the PA over it was pointless. You did what you should have done and talked directly to the publisher, so hopefully it is resolved. I would never say to just roll over and do what they want, but you need to have a frank conversation with the publisher regarding what "art director" means, because the two sides are obviously not sharing a definition. It is a poorly worded clause because it doesn't actually clarify what being art director means and what the limits of your authority are. Without reading the entire contract, it is hard to know.