The one without the @ part should be the community from your instance (e.g. if your account is in lemmy.ml then it is android@lemmy.ml). Since it is local, they just do not display the @ part
The one without the @ part should be the community from your instance (e.g. if your account is in lemmy.ml then it is android@lemmy.ml). Since it is local, they just do not display the @ part