Professional :: Visibility, Order And Position Of Dynamic Textfields Inside Movieclip?

this concerns flash cs5 and the timeline.Everybody knows the effect you get when you use appendText() to add text to a multiline dynamic textfield, right ? Well, I have a movieClip as a container, and I would like dynamic textfields to populate this movieclip in the same manner as textStrings would populate the dynamic Textfield. 
 
How would this work?I have buttons that trigger addChild() function so as to populate the movieclip with textfields, but how do I make sure that the textfields make up an arbitrary list as a menu user chooses which buttons to click?
Let's say this is the visible text when the swf runs.(I cut away some of the code to make this more to the point):
 
var buttonTrace:TextField=new TextField;
addChild(TextClip.buttonTrace); buttonTrace.x=0;
buttonTrace.y=0;
buttonTrace.text="Breadcrumbs";
 
Now for each time I click a button in the menu I've made, a new textfield appears with the name of the button. This is how I want it. BUT......... How do I control the display properties and positioning of dynamic textfields within a movieclip ? How do I control persistent visibility, and how do I make these textfields appear one after the other in the order they were clicked.