by Captain Sensible » Thu May 14, 2015 12:00 pm
You have six preset stake buttons to choose from below the ladder, the default selected one will be shown in red the others blue, if you double click on them you can change the default to whatever you want. Once you close the program they'll also be saved. I think the Stake set in preferences is used to choose the stake once the market is changed but if the £2 box is still highlighted that'll take preference.
I'd leave Options->Preferences->Staking as £2 and just change your boxes to the various stakes you want as it's a little failsafe to not click things by accident when switching markets.