Errata reported July 22nd:
There’s a small mistake in the charts on line 16.
The first four stitches in line 16 (from right to left) are four purls. When I do this, it doesn’t line up with the pattern in the next line. The fourth stitch should be a purl 2 together, then everything matches.
This is true for charts A and B, though, of course for chart B it would be the last four stitches affected.