Alright guys I'm a bit confused. I've put an order

Alright guys I'm a bit confused. I've put an order for 3 million shares at 0.0003 and it got partially filled (2.64 million to go). Is it wrong to think that my shares is at the top of the queue and the next 0.0003 sell would go to me? I've seen about 7 million shares just be sold at 0.0003 and none of it went to me. If anybody could shed some light on this that would be much appreciated.