Headscratchers / The Brain That Wouldn't Die

• At one point Bill says he won't be traced to the country house because Jan's body was burned beyond recognition in the crash. But it's still her car...
• When, Bill brings Doris home, after Kurt has been killed off, Doris sits in the chair Kurt briefly did as he was bleeding out. How does Doris not see all the blood? This is even brought up in the MST3K commentary.