Is this allowed?

[jxofaltrds]

Lets say the conductors are on the breakers as OP had assumed, still nothing wrong with branching out in a different direction than the "multiwire" portion of the circuit. The installer could have easily ran a three wire cable to a junction box, continued the three wire on and tapped a two wire out of the junction box and most would not question that - yet is effectively the same thing.

That was the question! TY.

 

[kwired]

That was the question! TY.

Glad to see we can agree on something