[splinters]

I have used Sigil to make my ebook from a file generated from InDesign. Everything works fine but lulu will not accept it as it list several errors. I can easily remedy this by running it through Calibre conversion but it makes duplicate covers.
My book is no text just a series of images with the text embedded in the picture (these are picture books).
If I tick 'remove first page' it makes one cover but the second page has some sort of space placed in front of it meaning that the bottom of that image spills over to the top of the next page (effectively adding in an extra page to the book).
It all lines up properly from the third page (inc. cover) onwards.
I should add that this problem is evident on a macbook and an iPad.

Any idea what I need to fix this or how to edit?