Speed Problem, Wired or Wireless - RT-AC68P

I am getting slow download speeds via wired (5.05 Mbps) or wireless (3.81 Mbps) on the Asus. If I plug directly into my UVerse modem I am getting 25.92 Mbps down. Upload speeds are in the 5 Mbps that is expect per my service choice of UVerse Turbo. I can expect download speeds up to 57 Mbps, I have been told by AT&T tech running new cables today. If I plug the Asus into the UVerse the speed drops to 4.64 Mbps while plugged into the Uverse box.

Before today, and the new modem, my speeds...

Speed Problem, Wired or Wireless - RT-AC68P