Imprecise prognostication

According to OKCupid's death test, I am likely to die at age 83 of a heart attack. (I have a 13% chance of dying of loneliness, though. WTF?)

But according to agingresearch.org's life expectancy calculator, I will live until I'm 91.9 years (which they still say is "less than it should be"). Luckily I can add a WHOLE YEAR by flossing my teeth every day. Hmm.