New Members being signed up as users in WP but not as members

Users who sign up are being added as site users in WP but are not being added as members in Membership 2.

More specifically on my site portlandyachtclub.com I have two tears of memberships, one for pending members that is open to all, and one for "Members" that is closed and pending members are moved into this manually.

Previously it was working great but looks like it hasn't been since a recent update and I'm wondering if someone can take a look.

Thanks,