Here is a perfect example. I logged into both UDM and the console, and the Media Room light (Insteon) is showing as off, but it is on. I query the device on UDM, and then both show On at the same time. So, to answer your questions, yes and yes :).
Funny, I bought the EISY hoping to solve the issue and now you say it is the PLM. Where do you recommend I purchase a new PLM from? The Insteon Store? Does serial or USB work best (I already bought the serial cable when I got the EISY)? Thanks.