Log In Issues at Homepage

I encounter log in failures when I try to log in through my homepage.

First, the text field type for Username does not automatically erase the word "Username" when I click on the box. I have to erase them first.

This goes the same for Password text field. Also, when I type in my password, the characters does not change to symbols! I can clearly see my password typed in the text box.

Worse, when I hit login, I receive an error message telling me that I entered the wrong email address and/or password.

If I retry it on other pages, my email and password works just fine as well as the text boxes.

Please urgent help needed!

Thanks!