Trying to delete site

I am a Web Technologies Instructor and actually have created several sites to use with the various classes I teach. One of them however, I created inadvertently and do not need but tried to fill out the form to have it dropped and received an error that I entered invalid credentials. But, I used the same username and password on that screen as I did to log in and create this thread so I am not sure why it would not take it. I tried two times. Please delete the phpclassmain site (NOT the phpcvccclass!). And, is there a limit to the number of sites I can create with my email address? It could be that I created that one with a different email if there is a limit....let me know. Thanks! By the way, I think your service is simple and straight-forward and it is perfect for my beginning students. I direct all of them to create accounts with you. Keep up the good work!