Glad I found this thread, I am having the exact same problem.
Bought some PacCoins for 1 satoshi around 24h hours ago, right before the sell wall went up. Put in my sell offer at 2 satoshis and went to sleep.
The next day, the wall was almost down, so I waited some more. A few hours later the wall was completely down, and offers began filling at 2 satoshis.
But not my offer, no. I thought I just had to wait a little, so that's what I did, but to no avail. That's when I started thinking that Cryptopia is messing up.
Went to google for help and found out that order matching engines operate on a "first come, first serve" basis.
With the volume at 2 satoshis (I checked the order book), my order should have been filled dozens of times by then, so I decided to give it another shot.
Cancelled the order and put in another one for 2 satoshis. The value of orders at 2 satoshis was very low at that time (< 1BTC), so I was sure it was gonna work this time.
But it didn't...
Volume at 2 satoshis has been way over the sum of orders at that price since I reposted my order.
Now the wall is up again at 1 satoshi.
I am not mad, but quite disappointed, that the system is not working like it is supposed to and so I would also like to know:
Is this really Cryptopias fault, like I think it is, or is it some kind of sorcery