Problem displaying user profile

We are not been able to display the profile information of users created using the function wp_insert_user() as described here http://codex.wordpress.org/Function_Reference/wp_insert_user.

You will need to login in our website in order to have access to the links bellow.
URL: http://eugadget.com.br/wp-admin
user: wpmudev
password: 12345

This is an user created using the function wp_insert_user() http://eugadget.com.br/questions/user/Thiago%20Magalh%C3%A3es/. In this case the object $wp_querie won't return the author id or the posts.

This is an user created directly in the backend of worpdress http://eugadget.com.br/questions/user/Maick/. Everything is works as it should.

In case you need more information please let me know.

Any help or tips on how to solve this issue would be greatly appreciated! This is the last major problem we need to solve to be able to launch our website.

Thank you in advance!