Multiple Outs from Kontakt - splitting stereo channel on VEPro to Mono and I can't fix it!

I have created a VEpro channel that has 13 instances of Kontakt running in it. I have batch created a separate output channel for each of the Kontakt instances and increased the number of outputs in VEPro to take each instance.

On some channels (not all) the signal is being split into 2 channels. Sometimes, for some random reason, the signal that is being sent from Kontakt to VEpro is the left and right channels of the instrument, arriving as a mono signal in two consecutive stereo channels in VEPro and then sent as two channels of audio to cubase..

I have attached a file image to show what the problem is.

Ignore the channel numbers in VEpro as they have been patched into various other instruments in the VEPro channels and therefore don't match the output names of the Kontakt instance directly.

Any ideas would be welcome...