Exitright,
Oanda does not care nor would they try to run a stop on a
demo account. You may have placed a stop on your demo acount at a level where others with real money were, but just because one Broker's price was a few pips off another means very little... it happens everyday. This was just coincidence.
When trading for real try to figure where the heard has placed their stops and stay clear of those areas.
Good Luck!
Bear
Might add, IMHO when the market is about to make a big move, alot of times it will trade in the opposite direction to shake out the weak players before it shows it's true direction. So when the trade looks obvious to you it's the same for a thousand other traders, the market only wants a few to ride and will try to throw off as many as it can.
Hope this helps