Just Starting - NEED HELP

I tried to map my network and it found my router, and only 2 of the 10 devices. My router’s DHCP table shows all 10.

It’s just a home network, with a Linksys router. I’ve been having huge spikes in latency when playing an FPS, and I’m just trying to figure out if the lag spikes are coming from a device within the network, or something with the connection itself. I had it search 192.168.1.0/24, and all devices are within the 192.168.1.100-150 range.

What am I missing?

Are you asking for The Dude help? Or general network question?