alpinek9.com: DNS changes revert after final confirmation

Please help fix DNS saving for alpinek9.com.

The signed-in Advanced DNS editor shows the correct requested changes on its confirmation screen, but after the final Submit it returns to the original values. The same failure occurs when changing only the apex A record. Authoritative DNS still has @ A 216.40.47.17 and www CNAME websites015.homestead.com.

Written support requested: A phone call is not possible. Please resolve this here or provide a secure written support ticket and case reference. Please escalate to DNS/domain engineering if necessary. Tell us exactly what verification is needed and how to supply it securely online; do not request private information in this public thread.

Two follow-up replies appeared after submission and reload but later became invisible, including while signed in. Please check whether moderation or a forum-saving problem is hiding them, and confirm receipt of this written request.

Requested website records:
@ A 75.2.60.5
www CNAME alpinek9-official.netlify.app

Please preserve every other record, including nameservers, MX, all mail host records, TXT/SPF, the wildcard, mobile and store subdomains. Keep the Homestead hosting and email services active. Please confirm the records have been saved and are being served by the authoritative nameservers.