I have a Kontakt instance with 12 instruments loaded on it. I've generated (in Kontakt) a corresponding stereo output for each one. When try to select the one of those outputs as an input for an audio track in Cakewalk, this is what I get:
Notice that it correctly shows the Left/Right/Stereo outputs for each Kontakt output, but only up to the fifth one. Before the check in the screenshot you can see how the problem starts: The Piccolo Left is not followed by the Piccolo Right but Contrabassoon Right (but this output is actually the one of the Piccolo Right), and the next stereo output (the one that is checked in the image), logically corresponds with Piccolo Stereo.
It seems to happen always at the sixth instrument. Here is another example, a Kontakt instance where I loaded 6 percussion instruments, notice the same thing happens: