Setting up 2 different models CDJ with Traktor

I have CDJ-350 & CDJ-400, when connect both to Traktor, both CDJs are loading into same deck in Traktor. I've tried with Mac midi setup and also aggregator. In Traktor I've selected aggregator device, output Deck A: 1&2, Deck B: 3&4. I'm very familiar with this setup, use it regularly, used to work before. But now it's not. Can someone help? Thanks

In Traktor, what are the inputs set to? To my understanding, inputs should be the same as the output.