ERR_NAME_NOT_RESOLVED changing domain, why????

Is possible to be a server configuration error? Can you tell me what can i control? thanks

what about CNAMEs used that way? :)

Now i have a problem with redirection, is possible due by DNS?

if i try to go to www.googlexperience.com/wp-admin/ it redirects me to http://googlexperience.comwp-admin/

So, DNS wise you appear to be mostly fine now.

andreas@corrino:~$ dig googlexperience.com NS

; <<>> DiG 9.9.5-4.3ubuntu0.1-Ubuntu <<>> googlexperience.com NS
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36361
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;googlexperience.com.		IN	NS

;; ANSWER SECTION:
googlexperience.com.	1651	IN	NS	ns3.digitalocean.com.
googlexperience.com.	1651	IN	NS	ns2.digitalocean.com.
googlexperience.com.	1651	IN	NS	ns1.digitalocean.com.

;; Query time: 64 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Sun Jan 11 00:05:35 CET 2015
;; MSG SIZE  rcvd: 115

andreas@corrino:~$ dig www.googlexperience.com A

; <<>> DiG 9.9.5-4.3ubuntu0.1-Ubuntu <<>> www.googlexperience.com A
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53783
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.googlexperience.com.	IN	A

;; ANSWER SECTION:
www.googlexperience.com. 1029	IN	CNAME	googlexperience.com.
googlexperience.com.	1029	IN	A	80.240.139.190

;; Query time: 72 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Sun Jan 11 00:14:21 CET 2015
;; MSG SIZE  rcvd: 82

andreas@corrino:~$

(The reason I say mostly fine is that I’m not a big fan of CNAMEs being used that way, even it will most likely be okey.)

Can’t tell for sure from my end, but my guess would be that your initial problem with DNS lookups was due to TTL/caching issues.