Zigbee Child & Route Info

I looked at my childandroute info for the first time today and I noticed it's missing a handful of devices. They just aren't in the table. I know they are connected and work. Is this expected? (just curious and trying to learn)

EDIT: Is there a wiki page where I can learn what some of the values represent? (LQI, age, inCost, outCost, routeRecordState, concentratorType)

Just an observation but I think devices on more than a few hops won't show up in the table. I have 100+ Zigbee devices and at least 20 of mine doesn't show up but I could see then using my xbee mesh discovery.

if you refresh the device it seems to wake it up and then refresh the page and you'll see it.