advice: dont hack next time

Yes,I had this happen to me aswell,it's nothing don't worry. All it is,is,when you did the hack,the amount of killstreaks you unlocked THEN. So now that you prestiged,the ranks and unlocks have to catch up,so until you reach the correct unlock as you were on before the hack,you won't be able to unlock any killstreaks. I know it doesn't make sense,but that's all it is. After you catch up,if you have any killstreaks that need to be unlocked,you WILL be able to unlock them ALL once you get to the final ranks.

Yeah whatever rank you were on before you did the prestige hack you have to get to that rank to unlock them again