guide
Adobe stamps in the wrong order - here is why
Acrobat's Bates numbering runs over the file list exactly as it was given to it. Select a folder and the list is name-sorted; the numbers are then continuous, unique and in an order nobody chose. The set looks perfect and is numbered by filename. This page explains the mechanism, the two ways it goes wrong, and the check that finds it in a minute.
Two ways the order goes wrong
The first is selection order: whatever the file dialog hands back becomes the numbering order, and a name sort puts volume 10 before volume 2. The second is a partial re-run: a few files are numbered again after a correction, so the set contains two numbering runs that each look continuous and together are not.
Why it survives a visual check
Every page has a number, no number repeats, and the digits increase as you flip through a single file. The defect only exists between files, which is precisely where nobody looks when they are spot-checking. It surfaces later, when a receiving party reads the set in Bates order and finds the story out of sequence.
The check that finds it
Read the Bates stamp from every page, group by file, and test whether the ranges are monotonic in the order the files are meant to be served. The audit reports the file that breaks the sequence, both its neighbours, and the page where the break occurs.
- Runs on the whole set, not a sample.
- Names the file and the page, so the fix is a decision rather than an investigation.
- Free on one PDF, so you can test the numbering tool before committing to a set.
Frequently asked questions
Does the audit fix the order?
No. Renumbering is a production step and ships with Prepare. The audit tells you exactly which files are in the wrong position.
Does this only happen in Acrobat?
No - any tool that numbers a file list inherits the list's order. Acrobat is simply the most common place to do it.