Custom domain name won't stick

Purchased custom domain with a popular registrar, by the third attempt to set our custom domain at the registrar, it seemed to work and then it didn't. Set the custom domain on the FTH admin console. Worked OK first couple times and then it reverted back to the FTH public default page. Note also that on the admin console basic setting tab, the custom domain keeps resetting with the www. prefix. even after a half dozen times I corrected and saved it without the prefix. I did spend the time searching back at least ten pages into the forum and did not find anything similar to this issue.
Toastmasters Club: Lodo Toastmasters #9839
Custom domain: lodotoastmasters.org
FTH domain: 9839.toastmastersclubs.org

Thanks for giving this a look.
Dan Larson, club secretary and FTH admin
Lodo Toastmasters #9839
Denver, CO

Your DNS records are not set up correctly.

Please review the following doc: support.toastmastersclubs.org/doc/item/dns-settings-overview

You have not followed the DNS setup instructions, you have left incorrect entries and not added required entries
support.toastmastersclubs.org/doc/item/dns-settings-overview

remove
lodotoastmasters.org. IN A 184.168.131.241

Add
www.lodotoastmasters.org . IN A 50.19.253.65
mail.lodotoastmasters.org. IN A 50.19.253.65
lodotoastmasters.org. IN MX 10 mail.lodotoastmasters.org

Thanks, Brian. I did read the configuring DNS doc and tried to follow the steps. There is a difference between what the doc recommends and what GoDaddy shows. Please see attached for how our DNS info is now saved at GoDaddy. Thanks.
Dan Larson, #9839

remove
lodotoastmasters.org. IN A 184.168.131.241

At the GoDaddy domain manager page, the line referenced with the domain name and location number cannot be edited. See attached