So, you're mad that you had a problem and tried to solve it in the worst manner possible? Let's walk through the numbers.
There are 11 T7 maps and 11 T8 maps. So, you have a 10% chance to hit your target map each attempt. 1 - (1 - 0.1)^22.5 = 9.34% you WON'T get your target map, assuming...