User blog:Ugo2001/Potential Plot Hole?

On Drum Island it was stated that the Blackbeard pirates attacked the island a few months ago. This means Blackbeard killed Thatch and left the crew a few months ago. Ace also left too. But, during Marineford there was a flashback of Ace showing Whitebeard a picture of Luffy's first bounty poster which he got in Arlong Park. This means Luffy got that bounty a few months ago and before Blackbeard and Ace left which doesnt make sense. The timeframe from Arlong Park and Drum Island couldnt have been a few months. Plot hole or...?