Direct TV wifi interferes with Mac

I Have 3 direct tv boxes, and it creates a wifi network that leaches off of ours to connect all the devoces. When it is trying to create its wifi, it literally brings my internet to 0.01mbs when I usually get 30mbs. Last night I figured out I could turn it off and it would fix my internet, now that only brings me back to 1mbs. Why is this happening and how can I fix it?