Welcome back to the forum Joep - I think you’re probably not doing anything wrong. In Play mode, those buttons for “set for this flow / set for all flows” apply to the changes you make immediately after choosing one, they don’t necessarily reflect the current/prevailing state of the voice. If you’re confident you chose the right option and then changed the settings accordingly, those changes should still be active (even if the button doesn’t confirm that to you visually).