From what I've been told when I've asked couple brokerage firms when looking at T&S when my trade wasn't shown as entered you have to remember they can make partial or whole trades.
Meaning if I wanted to sell 5k and u wanted to sell 10k they could put thru 12k then put in 3k with another order.
As far as double prints go I can't remember what that is suppose to mean. I remember many times hearing about it so it's common just having a brain fart right now trying to remember.