Once I have placed a bet at current odds it will place all subsequent bets at the same price. So if I back at 5.8 as best price and then it drifts after being paritally matched, I cancel bet and put up again at current price, (which is say 5.5), my bet goes in at 5.8 again and not at the new current price?
I use ibetmate its around 3 quid in the app store stunning piece of kit now incorprates 'what if' function to help with hedging cant deposit or withdraw though so use official betfair app for that.