Issues with the Haner Babies

We've got some issues with the Haner kids lately. The kids aren't sleeping and Kya is pushing Wyatt regularly despite consistent and swift discipline. I feel like we have tried everything. I am soooooooooo sleepy from getting up 4-6 times a night to nurse Wyatt and/or put Kya back in bed. They both go right back to sleep thankfully, but man oh man, it gets tiring.

Issue two: Kya pushes Wyatt often and his head hits the floor often. I am getting worried that he's going to have a concussion or some other serious problem. We have spanked, time outed, yelled, discussed, and done them all again and again and nothing works. She just keeps doing it! It makes me SOOOOOOOOOOOOOOOOOO mad and sad.

Any input would be greatly appreciated.