If you've recently reset your password and are still having trouble logging in (despite using the correct user name and password), you might need to update/reset your saved password.
Please note: Profiles no longer supports logging in via email, you must use your username.
There are a few things that might be filling in your login credentials with incorrect information:
1) It might be a cached field- clearing your browser cache and history will fix this.
2) It might be a saved (incorrect) password on your browser. Update your password in your browser's password manager, or try a different browser (make sure this one doesn't have the same thing saved), or turn off your password manager.
3) You might have a saved (incorrect) password in your password manager app. Update the password the password there, or turn off the password manager.