Passing Observation

I am currently doing some win expectancy analysis of the Third Test in the Ashes series, and I noticed a curious fact. It seems that Australia's 7th and 8th wicket stands, which between them added a single run, actually improved their chances of winning. Is there some kind of cricket Moneyball-style market inefficiency we can take advantage of here? 'Hey, Johnson, throw your wicket away so we can win the match.'

The only explanation I can come up with for that, without examining all the Test scorecards, is that it suggests that the pitch or conditions favour the bowlers to such an extent that the side in can expect to take a lot of wickets quickly once the innings finish. If anyone has a better hypothesis, I'd be interested to hear it.

As soon as I finish the analysis, which I hope is later today, I'll post some thoughts about the drawn Test.