4% possession bonus, 21K/21K in stadium

[tarcanes92]

Never seen this happen before. I had a full stadium 21K/21K on level 7. But I only received 4% possession bonus instead of 5%. I watched the game along with 2 of my friends and my opponent had one friend watch the game. Instead of 15% possession bonus, I only received 14%.

Is it possible b/c my stadium is too small for my level?