Changing the username does not affect the execution in OpenSTA

OpenSTA 1.4.4:

1. Recorded the script with an intranet application:
   • Launched the site
   • Logged in to the application
     • User name: test
     • Password: a1b2c3
   • Logged out from the application
2. Created a script with the recorded script with 1 virtual user
3. Executed the test
4. HTTP Data List displayed the Response Code for "GET http://wwa.cumidealers.com/login_validate.php?username=test&pas... HTTP/1.1" as 200 which is fine. Please refer ValidUserName.xls in attachment
5. Changed the User name to 'te' in the script and executed the test again
6. HTTP Data List displayed the Response Code for "GET http://wwa.cumidealers.com/login_validate.php?username=test&pas... HTTP/1.1" as 200. Please refer InvalidUserName.xls in attachment.
7. Can the response code be 200 for invalid login request? Please let me know.