Give me example.
But Martingale by definition is supposed to work like this: You bet X money - you lose - you bet X*2 money - and so on. And by "bet" I mean buy or sell, NOW, not later. Also only 1 trade at a time. Everything else is just assumption made by me. This behavior that you are talking about, maybe it was intentional. I don't remember exactly.
Also note that when Martingale looks at what will be the next lot size, it looks at the latest CLOSED trade. But before that - at the newest running trade (which again is not by the rules of Martingale and I made it to work that way only because of some people that wanted to play not by the official rules). Pending orders are not checked at all and I don't feel like doing this 🙂