Getting kicked off is usually a problem with your internet provider. If your connection drops for even a second it will log you off. Sorry–there is nothing I can do to fix that.
And I always write my posts in Word or Notepad first, then I can make any editing changes, then I just copy and put my cursor in my reply box and paste (ctrl V is paste).
Another way you might lose a new topic is if you do not choose a group from the drop down menu at the bottom of your topic box. This only applies of you start a new topic in the forum. If you go directly to groups and choose your group, then write your new topic you do not have to choose as you are already in the group.
Hope this helps. ~ JoAnn