I was going to suggest it might be a problem with synths having MIDI OUT enabled, and tracks being set to receive those outputs, but didn't because that should affect live playback as well as rendering. But looking at the first screenshot from SONAR, I am seeing the input of MIDI track 19 set to one of the outputs from Komplete Control with Auto-echo enabled. That's going to be a problem.
If you're going to have Always Echo Current MIDI Track enabled in preferences, you need to make sure that track inputs are deliberately set to a physical input port that isn't receiving anything, and/or ensure that MIDI OUT is not enabled on any of the synths.