Wait, so let me make sure I understand Final Hours -
You kill a turret or inhibitor, use the earned gold to buy and item, and after you buy the item the number drops into massive negatives, but isn't actually negatives - its just a visual bug?
Or is it actually negative and you cannot purchase anything?
And does it only occur after you purchase something, or does it happen after you kill the tower/inhibitor? Because this may/probably is related to the old -2 billion gold bug found here: http://na.leagueoflegends.com/board/....php?t=3150144
Let me know your in-game summoner name too, if that's alright, so that I can watch your replay and see what you're talking about!