SolarWinds can see a device with UDT but the switch's CAM table can't. Am I missing something?

I was troubleshooting a client and used SolarWinds' User Device Tracking to locate the client's port. The UDT output stated that there is an active device with an IP on that interface, but pinging that IP yielded nothing. The UDT report also stated that two MACs were present and active on that port, and yet when I looked at the CAM table I saw nothing. Is there something I'm missing? SolarWinds documentation on UDT did not clarify this nor did anything on Google. If there's anything more that I need to say please let me know!

Thanks for anything that helps me understand this guys, I appreciate it!