De Bugging, Dashboard, Login MAYOR MESS

Hey to you all ! I′ve been dealing with this issue for a month, and Im stuck.

I′ve posted the code moderators adviced I did …
https://s16.postimg.org/v4pv7n1ud/Captura_de_pantalla_2016_01_29_15_03_29.png

No change… Im not a developer, just a Designer so Im kinda clumsy with all of this.

This is how my login looks now…The design even changed.
https://s18.postimg.org/ogs2kx4m1/Captura_de_pantalla_2016_01_29_15_04_06.png

This is the response I get…in spanish. Guess in English this would be “redirectting bucle”…
https://s24.postimg.org/hw40onmj9/Captura_de_pantalla_2016_01_29_15_04_34.png

HELP !!!!!