Thank you for your post.
If the first three parts have "Page Break before" selected, then you will have the first sub-summary on the first page. When you encounter the second sub-summary, it will start on the second page, since that is what you checked. Then, as the third sub-summary is encountered, it will start on the third page, since you also checked the option to page break before the occurrence. You may want to consider only placing the Page Break before for the first sub-summary.
Doesn't seem to be working. I've set the first to Before and the rest to After. I still get a summary only page, no body records. I've tried converting them, moving them after the body part.
I think I found the answer. I've taken away the page breaks on all except the last summary part. The theory is, page breaking on the last summary part should force a break for all summary parts sorted before the last summary part. It appears to be working. What do you think?
Glad that you got it working.
Note: If you set the others to "After", then it will skip to the next page after that sub-summary part.