Needs one more thing

Why is it when u press the back arrow, u go to the previous searches word instead of the previous screen? Why would I want to go back to the previous word? Ive already searched for a new word and am working with it, trying to find the right synonym. I need to go back to the list of words pertaining to the current word search, not back to the previous word search!

Deanoo about Thesaurus Rex by Dictionary.com