I still don't understand how much you made profit as the Stake column and Profit/Loss column shows the same amount. Is it because of the very low odd?
I was about to post these bets like the regular screenshots but take a look here:
Bets #72-#73
Got no more Australian races today, Sunday usually is packed with races.
Let me try to answer your question:
Take the last one (Bet #73) - Mallee Pearl, who btw finished second.
I get 10 EUR if the dog loses, and I have to pay 415.18 times that if the dog wins.
So in another words I have to risk around 4,150 EUR in order to win 10 EUR.
That's a huge risk for a small gain - BUT - you are betting the dog won't win the race ... this dog for instance had 101, but the BetFair market treated him with much more caution for instance (the best thing is to bet on dogs or horses where both in TV and in the market you see the price sliding and going away).
Also beware of Harness Racing - it's much more dangerous than regular one (although in the US it's more solid than in Australia).