I received the email from Stefanie. Unfortunatelly, it does not help much as she remarks that:
"Errata for Interweave Knits are handled through their website.
They have a "contact us" link at the bottom through which they can be let know of any problems.
They'll update the site as soon as they are aware of the problems.
There are no errata to the last issue of Interweave Knits posted yet. Gretchen sent them an email (Thank you Gretchen) so hopefully, they will post the corrections soon.