Achievements assassin creed 3

HI

I have been playing assassin creed 3 and I have two achievements that popped up originally when playing but never registered as unlocked. I have tried everything including resetting my Xbox to factory minus the game saves. I have
since tried to redo them but nothing will pop and the achievements remain unlocked.

The funny thing was originally on the Xbox 360 side was showing 10 achievements as being done but 12 icons where showing as unlocked. Then after a re sync of the Xbox 360 data it now only shows 10 icons to match the number unlocked. I don't mind that but
every time I replay the mission the achievement will not pop up on completion, The two in question are
bring down the house and tumblehome.

Apart from starting a new game I cannot think of what else to do but I really don't want to do that as you cannot unlock these till quite a way into the game. Is there anything else I can try ?

:)

 

Anyone else fed up of games forcing multi-player down our throats?

Also tired of forced MP achievements for "MP Discovery" in games such as Assassins Creed: Brotherhood, Assassins Creed: Revelations, Assassins Creed 3, Assassins Creed 4: Black Flag. See a trend?

 

The achievements are having trouble to unlock

 

Yeah they wont pop now as one for completing a mission and I have replayed that mission too many times to count.

 

Assassin's Creed 3 is famous for containing bugs realted to achievements. You would have better luck with Ubisoft support

 

They sent me here

 

They where the ones to send me here

 

Many players are reporting this, achievements are having trouble for unlocking, You got to wait

 

How long as its been almost two weeks