Every HQ time upgrade always show 1 day more then estimated time after 1st day, eventhough the upgrade finish at the same time with estimated time. But it will always make the upgrade by tokens cost double on last day. So, the upgrade will always cost 5 tokens more than estimated after 1st day. Thankyou very much Game-Dev.
Anyway, i use Firefox browser on Windows 7 SP1 64bit to access this game. Is it matter ?