how come sometimes when I view a certain thread it fits nicely into my window, and other times one line will go on forever without a carrige return forcing me to scroll left and right all day long? Is this because of the use of the code tags?
Typically, yes. If someone in the thread has included a really long line inside code tags, it forces the entire page to that width. Typically if we sheriffs see such a thing, we will try to edit the offending line so it's not so long. Next time you observe such problems, post a note to the thread in question asking one of us to fix the problem - we should be able to help.