Greater Union Cinebuzz Free tickets website Bug

for the greater union cineabuzz i have only 200 points which is = 2 free tickets but after using my 200points my points where not deducted off yet so i had a shot purchasing 2 more free tickets and ends up i was able to purchase 2 more free tickets… i just hope even if greater union found out my tickets still work. try 100 points should be able to get another 100 since must be delay or bug.