It's not "if the server decides to do so". Once there are enough players in a zone, the game opens a new channel. Works like that for all the maps in this game. Thing about Nyraka is that while most maps start at 2 chn by default, Nyraka starts at 1. On top of that the amount of players required to open a new chn is WAY too high for what you need to be doing in there. Not a single mob in there survives without getting attacked more than 1 sec, no one has more than 3 fps, yet the game thinks that's not crowded enough for it to need a second chn. Also doesn't help the fact that there is no safe zone, like there was in Ebon, and that if you get killed you get kicked out of the map, so you don't count for the total ppl in the map, like afk killed players did in Ebon, which helped pushed new chn quicker and easier.
All in all what I'm trying to say is that the map is ❤ ❤ ❤ ❤, its awful thought out and I'm not surprised. To quote our friends from the Blackram Marauders, "HA! As i expected".