Happy new year to all.  

I have had a very stable system for many years.  My Isy 994 needed replacing with an EISY.  That went fairly well, but subsequently I've had behavior issues and am curious if others have seen the same, or have recommendations.  In a nutshell, within a scene some devices will respond appropriately, but not all, they will respond to manual commands, however. This is both on and off commands.  It's not always the same devices within a scene, but there are one or two recalcitrant ones.  I could chalk this up to the Insteon controllers, but now the particular scene I had issues with is working fine, but a new scene is not behaving.  In this case it's only two devices, and they come on fine, but do not turn off.

Look forward to hearing your thoughts. 

When on commands work reliably and off commands do not you need to start looking at the loads that are being turned on for noise issues. 

In addition to @tazman's suggestion, did you migrate your original PLM or buy a new one? If migrated, about how old is it. What are the 4 numbers on the white sticker on the back?

Ahhh, yes noise.  I had to put a noise suppresser on some halogens years ago for a different scene and it has been responding fine.  But I just have standard bulbs in current set up and it had been quite stable (no changes since EISY). Could load noise in other circuits be the culprit?  That may be a little hard to track down if so.

Paulbates, I did upgrade the PLM with the EISY.

Two suggestions:

1. When using the scenes and devices are not turning back off, either remove the load (unscrew bulb,etc) or pull the bottom tab out on the switch. Keep repeating until everything else functions. Either the load is the culprit or, see 2. 
    
2. Sometimes insteon devices that have run in place for many years need to have their data refreshed. If there are switches that are more likely the culprit to the problem, factory reset them and then right click in iox and restore device. In my experience it's been these devices in this order: keypadlincs, togglincs, any device that's the most remote from the eisy in terms of wire feet.

Unrelated info, I grew up in Woodlawn, just south of you!

Edited January 3Jan 3 by paulbates

Paul, great info.  Thank you.  It's a very small world!!

@fegelmej, I had a huge list of issue migrating from the 994 to the Eisy.  Some was my programming, some was "tokens" not connecting.  Here is the shortcut to the list of everything I did and notes where scenes and devices do different things in IoX, which I didn't have issues with before.