During a cold boot something got confused and my Installed instance started reporting the traffic detected by one of the Portables. As well, a popup claimed that two hot keys had already been registered.
My solution was to close the portables then the installed and restart them: first the installed, then the two portables and the correct counts were recorded.
I thought that each instance was discrete but apparently this is not the case, there's a short period of time when they all use a common workarea
There are probably not many other folks that run 3 instances so now that I'm aware of this I can control it but thought that you should be aware as well.
J