CS6 Print Booklet won't print all pages

Hi,

I have an 8 page brochure. When I select print booklet, pages 8,1,2,7 print as a booklet, then 3-6 print single sided. I thought I would print the document separately and I was able to print 3-6 as a booklet, but 8,1,2,7 print would only print single-sided.

Thanks in advance.