i have the same problem, i have invoices of 2 or more pages that i only get on paper and can't get them in.
however i found the following workaround while waiting for QBO to update their app:
- use a scanner app that can scan and convert scanns to PDF. I'm using iScanner
- in that app, i can scan multiple pages and make ONE pdf of it
- then from within the iScanner app i can send it to the QBO email address for receipts
i don't understand we can't do that from within the QB app though. it's a basic feature.