Interesting post about K-pop. The only thing I will say though, and I hate to say it is some of your info is outdated.

• Sistar - is not longer promoting as they're group decided to disband and go their separate ways.
• Secret - is down to 3 members as one member (Sunhwa) left the group in 2016
• Miss A - is down to 3 members as one member (Jia) left the group in 2016
• After School - the line up is outdated. Kahi "graduated" from the group back in 2012. The current lineup in this group is E-Young, Kaeun, Raina, Lizzy, and Nana