Now the non-www record is triggering an SSL error. Upon further investigation, it looks as though the previously delegated CNAME is interferring with the newly delegated values;
NET::ERR_CERT_COMMON_NAME_INVALID
Subject: secure.pageserve.co <<— OLD CNAME AT PREVIOUS NS
Issuer: Let’s Encrypt Authority X3
Expires on: 16 Jan 2019
Current date: 15 Nov 2018