Has an AFL game ever ended 69-31?
Exactly once. On May 27, 1911, Melbourne beat St Kilda 69-31, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 69-31 in league history.
That makes 69-31 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 70-31 has happened 2 times and 69-32 has happened never.