Bursting Definition sending multiple email attachments

I’ve set up a bursting definition with 6 reports. I uploaded a Targeted Distribution file that maps each bursting POV dimension member to its recipients’ email addresses. In the Email Options box, I selected Consolidate Attachments.

However, each recipient is receiving 6 separate emails, one per report, instead of a single email with all 6 reports attached. I expected Consolidate Attachments to combine them into one email.

The total size of all the reports combined is under 10MB; each of the 6 reports are less than 60kb. They do not want a book as they want to see each of the 6 reports as individual PDF’s.