As it has been said, if you try to train from an npc but do not see any skills/stats to train from them, this means you have already trained more than that particular npc can train, or that you are not high enough to train from them yet. Assuming nothing has changed with the npc you listed from the last time I updated my list of "secret non forum apropriate info", you probably aren't high enough yet in certain stats to see what he offers as training.
As for the second, it's not really a bug, more like bad timing. The server crashed, it lost all unsaved data, hense when you log back in, you may not have all the training you did anymore. You may have noticed this similar effect when you run somewhere, the server crashes and you relog in to find yourself in a different place.