How can these battles both be a Mastery 3?

nuclearguy931, on May 10 2016 - 06:29, said: If you hover your cursor over the Master 3, you will see the requirements for it. A 3 should be based on the average XP of the player base in that tanks for the last 7 days, you must get better than what 50% did. Your base score for the 2 battles was relatively close, 414 in the first and 387 in the 2nd.   Mastery Badges Mastery Badge: Class III - Earn more experience than 50% of users who battled in the tank for the previous 7 days Mastery Badge: Class II - Earn more experience than 80% of users who battled in the tank for the previous 7 days Mastery Badge: Class I - Earn more experience than 95% of users who battled in the tank for the previous 7 days Mastery Badge: Ace Tanker - Earn more experience than 99% of users who battled in the tank for the previous 7 days