Not sure if this is the place to test a dice roll, but I'm curious about something stated in the initial post.  So I'm going to roll some dice, and then take it from there.
[roll0]
So the first post of this thread indicates that you cannot ADD rolls to a post once it's submitted.  I'm wondering if the language is supposed to be that you cannot edit an existing roll?  So here's the test.
[roll=Second Roll]1d20[/roll]
That's interesting.  It really is that you cannot add rolls to posts after you submit.  I'll have to work out how to do posts where I need multiple rolls for different things.  Hmmmm......