Short answer: This is normal — the watermark will not appear in your printed book or ebook.
What’s happening:
When you download a Preview of your cookbook, you may see a light grey Heritage Cookbook watermark on recipe pages. The watermark is there for preview purposes only.
Good to know
The watermark is only visible in Previews
It will not appear in:
Printed copies of your book
Any ebooks you purchase
No action is needed on your part