Hide Forgot
1. step into model name edit page; 2. check "add new make"'s check box; 3. select one new value from dropdown list "Make"; 4. "add new make" 's text field was disabled, this is expected; 5. "add new make" 's check box was still in it's selected status, this is not expected.
You will meet the same problem when you perform above steps in create cert page.
This bug has been fixed.