Issue: Some permission problems

I'm currently away from home and have tried to create an article with my sisters login details but came up with some problems which I'm confused about.

I have several ranks on my website

Administrator
Officer
Member
Friend
Registered

Admins and Officers should have full article creation/editing permissions
Member and Friend should have the ability to create/edit articles
Registered has article creation and can't edit or delete.

Now all these perissions are set up like the above but when logged in as an officer I create an article, save it.....and it takes me to the search page but doesn't actually create the article.

I created a new user who had just registered permissions and eventually got this so that it let me create an article. I then moved this user to the officers usergroup (which has full permissions) and attempted to save an article and it did the same as before...took me to a search page and didn't save.

Could you please take a look at my permissions and let me know what is wrong?? and why it wont let me create articles as an officer?