Here are some fixes for weird formatting (thanks to Full Trucker for teaching me some of this):
To avoid (get rid of) the weird html codes that pop up:
* the quick reply box doesn't add them
* the box that has all the formatting options does add that stuff
* If you post using that box and want to get rid of the stuff, choose "edit post", then in the edit box, click the upper left button that says "source". That will show all the weird formatting and you can delete it there. The "source" button is the way to avoid posting all that crap (it doesn't do anything automagically, but does allow you to delete it all).
If you want to quote someone and find the quote button pulls up a different post:
*double click "reply with quote" button, or
* right click the "reply with quote" button and open in a new tab