ePub interior cover issue

Hi

I’m trying to solve a small issue within any given ebook.

At the beginning of an ebook I always insert the cover on page one. I use QuarkXpress for the layout and ebook conversion to ePub and then tidy it up in Sigil. However I find the cover from page 1 is repeated when I view in Adobe digital editions, iBooks or in Sigil on page 2. I wanted to remove the repeated cover so I delete the html file that includes the 2nd cover. I done this by unzipping the file. When I open the file in ADE its fine as always. However when I open it in iBooks as a test it says the file is corrupted. This only happens to the ebook after I delete the html file associated with the 2nd cover. Any way around this?
David