Choose coordinator/router device talks to

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Hello, I am using a SONOFF Zigbee 3.0 USB Dongle Plus as my coordinator and also have a Smarthings Zigbee outlet which acts as a router/repeater. I have a dozen or so Zigbee devices in my network and most work fine but a few seem to have delays when speed is critical (door and motion sensors which trigger lights).

Upon looking at my Zigbee network map, I found some of my sensors are not taking the best route. A sensor 10 feet line of sight away from my coordinator is instead connecting to the router on my upper floor. And devices on my upper floor less then 10 feet away from my router are instead connecting to my coordinator on my lower floor.

From the research I've done it sounds like Zigbee is supposed to automatically pick the best route, but both distance and signal strength-wise it is making bad choices. I looked into "binding" but this doesn't seem to accomplish what I am trying to do. Is there any kind of setting I can configure per-device to tell it which route it should take?