::I just took a look at some of your IP's history: the warning applied to Mathematical Notation does not appear to be valid, from what I understand. However, today's warning regarding MacGregor State High School absolutely appears valid, for the IP removed a sizable amount of information from the article. If you did this edit and you felt deleting the information made the article better, an explanation as to why in the edit summary (at a minimum) and in the page's discussion page would have helped identify you as a non-vandal. My advice is to improve your editing practices by 1) registering, 2) using edit summaries, 3) avoid deletion blocks of information rather than improving them and 4) invite discussion before making major changes.  
 ::By the way, the IP vandalism tag does not hinder your work in any respect. What it does is help admins quickly identify edits that may involve vandalism, so that that IP can be more quickly blocked when vandalism sprees occur.  
 ::Good luck!