hmm, I thought I did all of that. Why would it work for some and not for others? Thanks for letting me know.
The way it's currently configured, there's no way t's working for some. If it't working, it's because they are hitting www. On the nameservers you're using, www is setup as a cname, but the non www is setup to point to GoDaddy (68.178.232.100). Since it looks like you're using GoDaddy DNS, you'll have to change the @ record to point to shopify to make it work. Technically, you shouldn't be able to make the @ record a cname. Here's what I'm seeing:
acedia:~ ccall$
dig -t ns stealthgearusa.com
; <<>> DiG 9.8.3-P1 <<>> -t ns stealthgearusa.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45265
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 4
;; QUESTION SECTION:
;stealthgearusa.com. IN NS
;; ANSWER SECTION:
stealthgearusa.com. 3535 IN NS ns61.domaincontrol.com.
stealthgearusa.com. 3535 IN NS ns62.domaincontrol.com.
;; ADDITIONAL SECTION:
ns61.domaincontrol.com. 86400 IN A 216.69.185.32
ns61.domaincontrol.com. 86400 IN AAAA 2607:f208:206::20
ns62.domaincontrol.com. 86400 IN A 208.109.255.32
ns62.domaincontrol.com. 86400 IN AAAA 2607:f208:302::20
;; Query time: 218 msec
;; SERVER: 10.2.76.13#53(10.2.76.13)
;; WHEN: Wed Sep 26 09:15:07 2012
;; MSG SIZE rcvd: 176
acedia:~ ccall$
host stealthgearusa.com ns61.domaincontrol.com
Using domain server:
Name: ns61.domaincontrol.com
Address: 216.69.185.32#53
Aliases:
stealthgearusa.com has address 68.178.232.100
stealthgearusa.com mail is handled by 10 ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 20 ALT1.ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 30 ALT2.ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 40 ASPMX2.GOOGLEMAIL.com.
stealthgearusa.com mail is handled by 50 ASPMX3.GOOGLEMAIL.com.
acedia:~ ccall$
host stealthgearusa.com ns62.domaincontrol.com
Using domain server:
Name: ns62.domaincontrol.com
Address: 208.109.255.32#53
Aliases:
stealthgearusa.com has address 68.178.232.100
stealthgearusa.com mail is handled by 10 ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 20 ALT1.ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 30 ALT2.ASPMX.L.GOOGLE.com.
stealthgearusa.com mail is handled by 40 ASPMX2.GOOGLEMAIL.com.
stealthgearusa.com mail is handled by 50 ASPMX3.GOOGLEMAIL.com.
acedia:~ ccall$
host www.stealthgearusa.com ns61.domaincontrol.com
Using domain server:
Name: ns61.domaincontrol.com
Address: 216.69.185.32#53
Aliases:
www.stealthgearusa.com is an alias for stealthgearusa.myshopify.com.
Host stealthgearusa.myshopify.com.overstock.com not found: 5(REFUSED)
Host stealthgearusa.myshopify.com.overstock.com not found: 5(REFUSED)
acedia:~ ccall$
host www.stealthgearusa.com ns62.domaincontrol.com
Using domain server:
Name: ns62.domaincontrol.com
Address: 208.109.255.32#53
Aliases:
www.stealthgearusa.com is an alias for stealthgearusa.myshopify.com.
Host stealthgearusa.myshopify.com.overstock.com not found: 5(REFUSED)
Host stealthgearusa.myshopify.com.overstock.com not found: 5(REFUSED)
acedia:~ ccall$