We're sorry you experienced a problem. Installing 7.0.3 over the top of 7.0.1 is the correct procedure.
We'd be glad to take a look at your installation for you and fix it.
Please open a Private Support Ticket (under Support) and provide the following:
Super admin user/pass to your site
ftp credentials
access to phpMyAdmin - this is crucial because what probably happened is that he database updates were not applied.
Don't worry - we do this all the time and your data will be kept secure at all time.
Tom