The manual is correct in that you currently cannot make page 17 play after page 16. And therefore you will currently not be able to chain all 64 pages into a single structure. But – there may be some things you can do still.
Depending on the content of your pages you may think about the following:
– use chains inside pages.
– use retriggers (page STA) on pages in your cluster of 16 – on pages that repeat themselves that is.
– use lower tracks speeds possibly combined with higher page LEN values on pages that allow it.
If and what you choose to do from the above (if applicable to your material) may also require re-grouping the elements in your song. Let us know how it goes.