Hi!
The login form does indeed set the redirect to this page [login to view URL]~medicalc/[login to view URL] though on the component documentation nothing suggests that it handles the login form also, just that it auto-logs you in upon activation, so this may be the reason why it's going to the profile page.
Regarding the "Clear" button, I already found the reason for it, so that's gonna be easy to fix.
As for the error messages on log in, again it's not certain that it's handled by this component, so it may have to do with whatever component is processing the logins, just so you are aware of such possibility.
Kind Regards,
Dobri