Thanks for that, I can see these includes in the body of the page. They should be in the head section of the page but I don't think this alone would cause the problems.
I have tested this page in FireFox and Chrome and the only time I can see the error messages is after I submit the form. Once I do this the page will show the error messages. This is what should be expected for the server validations since they are based on session variables. If I enter one of the values that the form is looking for and submit the form it will show the other error messages but the one for the value I entered is no longer there.
If you have a different browser you can test this in you should give that a try. If you go to this page directly in a new browser session you should not see the validation error messages. If you submit the form without entering the values then you will see the error messages. If you close the browser completely and open it again then visit the page it should be reset to it's default. Please give this a test and let us know what you experience.