WP 1.0 Bot - Quick Question 

I just discovered that WP 1.0 bot can be run manually.  In the changes log for my project, the bot lists assessment updates on a daily basis.  So, what happens if I assess some articles, run the bot once, and then assess some more articles and run the bot a second time all in a single day? Would it be two separate headers, or would the bot just add the second round of assessments to the same day's list? I hope I've been clear with this question, it is really late here.  Thanks.