Enemy Surrender

Last night upon playing the enemy agreed to surrender, with a 4 to 1 decision. Being the bright team that we were, we all blew flash, ulti's, dove double turrets, ect. -Only the game didn't actually end. The agreed to surrender but the vote meant nothing. They actually come back to win the game. I know some will say (in hindsight) don't blow everything for a stupid reason ect ect, but that's not relevant because the game should of ended.