Scrolling Text Around Shape

Hello, I am trying to do a simple text scroll around a shape. In all of the tutorials I have watched I am told that in order to fill the shape with text I can just select the text then copy and paste it until I am satisfied with the amount of text. I am running into a problem and haven't seen any problems posted / solutions about it. Every time I select the text and copy/paste it, it eventually hits a wall, like it is the end of the text box. 

Not sure what the issue is as it seems like all of the videos I've seen have had no issue copy/pasting. 

Attaching photos of my project. Thank you!