In case Adobe gets to this bug, here's some info on what's happening:
```
This is a bizarre document, each letter is its own individual image. So the image for 1 is shared on the page, so each time it’s referred to at a different location but it’s the same image. Redaction edits the image, so the other instances of it being referred to are now changed.
We suspect the PDF may have started life with Type 3 fonts, which define an image for each glyph as a CharProc. Then the PDF software used may have gotten rid of the Type 3 fonts and changed them into regular images.
```
In case Adobe gets to this bug, here's some info on what's happening:
```
This is a bizarre document, each letter is its own individual image. So the image for 1 is shared on the page, so each time it’s referred to at a different location but it’s the same image. Redaction edits the image, so the other instances of it being referred to are now changed.
We suspect the PDF may have started life with Type 3 fonts, which define an image for each glyph as a CharProc. Then the PDF software used may have gotten rid of the Type 3 fonts and changed them into regular images.
```