sonarman1
Also a possible bug with the Record arm? When no input is selected its still possible to arm it using mouse click but then doesn't get unarmed unless by clicking the global button or using Alt+R. In case someone accidentally arms the track without selecting the input it gets a bit messy, especially with the smart swipe around.
FYI, I can't reproduce this on my system.
If no input is selected, arming a track will automatically choose the first stereo input* of my audio interface.
This is the default behaviour as long as I can remember using SONAR.
And arm/unarm by mouse click works as expected here.
Same when using a Control Surface.
Sorry for not being very helpful...
Edit:
* stereo input independent of track interleave (changed with 2016.04)