This explains some odd behavior but it's not a big deal.
This is a monstrous fuckup of enormous proportions, if this is true then their trading engine is broken beyond repair and should be taken down and replaced by something else immediately!
Right, out of order execution is not acceptable.
I dunno. It just depends on the matching algorithm. It may not be industry best practices but I don't see that it necessarily shouldn't be acceptable in and of itself.
when my bid didnt fill and should have, i had to go on and chase price up so yeah i lost money, fuck bitstamp