Contagion spreads Curse, not only Chaos DoTs

Relevant skills as currently equipped:

Contagion, level 6, no support

Conductivity, level 7, supported by Expanse and Impending Doom (initially)

Sequence:

* Curse an enemy with Conductivity.
* Cast Contagion on the same enemy.
* Kite into a group.
* Kill initial enemy.
* Curse spreads to others.

I had initially thought this was interacting strangely with the Impending Doom, but is also occurred when I unequipped it.

Good luck and godspeed.