Yes sir that is correct. The user is subscribed to a particular newsletter per their CBSubs plan. Unfortunately, when someone registers in CB without completing their registration, it unconfirms them in Acy.
I've reached out to Acy as well and they're looking into it. If you have any thoughts please let me know, I will let you know if they're able to figure it out. At this point, not sure which end it is on.