Asus-RT-AC87U Problems

I am going to preface this post and say that I am by no means a network professional, so please excuse me if I forget to include something in this post. I sincerely appreciate any and all help or suggestions.

I have two ASUS RT-AC87U routers in my 2 story house.
I have one router setup: Operation Mode: Wireless router (Firmware: Merlin 380.57_0)
The second router is: Operation Mode: Access Mode (AP) mode (Firmware: Merlin 380.57_0)

I always seem to experience intermittent internet...

Asus-RT-AC87U Problems