I notice that your access point is on channel 6 and your wireless_script reports:
31 APs on Frequency:2.437 GHz (Channel 6)
I recommend that you change to channel 1.
Second, I recommend that your regulatory domain be set explicitly. Check yours:
sudo iw reg get
If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:
sudo iw reg set IS
Of course, substitute your country code if not Iceland. Set it permanently:
gksudo gedit /etc/default/crda
Use nano or kate or leafpad if you don't have the text editor gedit.
Change the last line to read:
REGDOMAIN=IS
Proofread carefully, save and close the text editor.
Finally, I worked on a case a couple of weeks ago where connectivity was impossible because there were spaces in the name of the access point. Yours is named Casa De Messi. I suggest you experiment by changing it to CasaDeMessi or Casa_De_Messi, or some such.