WP is reading half translated strings on localization file

I’m using a wp plugin called CodeStyling Localization, that helps me to translate theme strings.

I have translated all the strings, from English to Italian, and created the file “mo”.

Once done, I find half-translated strings and other untranslated strings.

For Example look a these two images:

This is the translations table. Each string is transtated into Italian: Translations Table

This is what i see when i open an admin page with some strings inside: Admin Page

This also happens to the website.

I’ve already checked the code of the theme, and all strings are declared using the __(..) function and the constant WP_LANG is declared as “it_IT” inside wp-config. What could be the problem?