Can ANY player confirm about HQ upgrade. I'm asking about HQ being upgraded every 5 lvls. Once upgraded to lvl 5 lv 10 lvl 15 etc. does the game make it to where you can't get knocked below those lvls?? example, working from lvl 5 to lvl 10. I know you can get knocked down from lvls 6, 7, etc but once to lvl 10 you can't get knocked down below 10?? So, a safe lvl every 5 lvls?? is that how the game is coded??