Thanks for the reply.
I realized I had a typo in my initial post. My current plan is 100 Mbps. I tried disabling the SON feature before but it didn't seem to work out as one of the two channels that I was expecting disappeared. I did mess around with the channels but I'll go back with your suggestions. Though I still have my old Verizon router I own, is it possible to swap that in to troubleshoot whether it is indeed some flaw in the new router?