Question about gamerscore

[Particle]

My account is currently banned, so for the time being, I will be going for gamerscore. I was wondering if I unlocked achievements offline on 360, then unlocked achievements on the One and signed in on the 360 after my suspension have been up. Would it keep up with all the achievements I have done, or will I be missing some achievements?

 

[Yui]

You shouldn't be missing achievements, I used to go Offline all the time back in the day and still have the achievements I earnt offline in online mode, the only thing that'll be missing is the date the achievement was earnt.