You can update your character as much as you want for as long as you want. As for the deadline, that is the deadline for me accepting new players because I don't want this rp to get out of hand in size. In addition I don't want there to be 10 player characters right off the bat either, however I will certainly allow it later on. For the beginning I'd like us to all start off with one and get the game going and as it progresses we can get larger and maybe accept new players then and if you want to play two characters at once at that point then you certainly can.