extra page at beginning throws off layout
I've published several print books successively with Lulu. But recently I tried to publish another book (hard cover). I ordered a proof copy and found, to my dismay, that TWO blank pages appear before my first printed page. That causes the first printed page to appear on the left (verso of the second blank page) rather than on the right (recto). It throws off the entire book, with all odd-numbered pages falling on the left and all even-numbered pages falling on the right. My past books (hard cover) have had one blank page (blank on recto and verso) before the first printed page appears next (recto). What did I overlook when I downloaded the print-ready copy? I'll just delete the book and start over but I don't want to make the same mistake. Thoughts?
Thanks in advance,