Is there any fixed order in which cards from the raft go to docks? Like, the 1st (lowest) card from the raft goes into my dock and the 2nd goes into the opponent's dock.
Nope. It's up to the player who took the cards.
This does make it possible to manipulate the docks just a little bit, but the point isn't to add strategy (because the manipulation is pretty slight, anyway). Rather, I didn't want to add an extra rule. If a player decides to do it the way that you suggest, then that's allowed. But if they mix it up, they haven't cheated!