Stop burrying the detailed invoice
When people click "Review and Pay" they should be immediately shown the detailed invoice, not the ACH payment portal. You must have changed this in a recent update and I have personally received many many complaints from my clients. Or at least make a huge, obvious button for "View Invoice"
Junk Male commented
it's because they don't have a clue what they are doing,have you read any of the other comments? Congratulations, you can read, sorry to say, they can't!