Tremor support gem and Rolling Slam (not related to each other)

The Tremors support gem seems to eliminate all bonus aftershock percentages from your ascendancy and skill tree. Tested about 30 earthquakes with tremors slotted and unslotted and tremors resulted in a lower % aftershock on the initial aftershock proc.

Rolling slam still does not do damage from its aftershock procs, and whether intended or not, has no aftershock chance on its initial hit.