My halo 3 campaign locked bug

Games Other Halo
1

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I finished Halo 3 on Legendary with 100% achievements years ago,the other day i loaded up halo3 to find to campaign locked like i had never played it ,and why dose my service record say i only did it on normal that’s bulls***, i finished the fight on legendary i remember doing it because my internet was down for a week i had nothing else to play but halo 3 and gears of war,plz 343 can you fix it thanks

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You messed my game up 343 plz fix it

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It has to be an online bug i played a campaign level saved&quit, changed some settings then signed out and in then loaded the game, and everthing reset again this game has now become un playable for me. Seriously 343 you need to fix your Halo 3 servers.