problems everywhere!!!!!

i have two problems.

1. first is upgrading. i have build everything there is on floodlights and video wall, but floodlights won't go any further than level 8 and video wall level 9. because of that i can't build anyting else. anyone having that problem?

2. second is that during the game there is a major problem. when i change a players in the middle of the game, somehow my team begins to grow weak and opponent always scores. ALWAYS even if the opponent is weak. so i have to either not change any players or have to change them during the half time, when you you don't know which player you need to change.

these problems really needs to be fixed, especially the first one, since i had that problem for a way long time.