I was short 2x YM pre market monday. I set my stop at 8593, and got filled 2 contracts filled at 8606. Now what gets me is that 2 contracts were both filled at 8606, a full 13 ticks north of my stop. I could understand if one contracted was filled at 8595 and another 8596 in a fast moving market. But both at such a high price? What do you think?