If you apply the effect to the layer and THEN duplicate it, the effect will be on both layers.
If you duplicate the layer, then apply the effect to only one of the layers -- double check that only one layer is highlighted -- the effect will be on just one layer.
Please confirm you did one or the other.
Unless there's a hole in your top layer or the layers have some blend mode applied or the layers are in a different position you will only see the top layer. Think of the timeline as pile of postcards. If there's not a hole in the top one you cant see the one beneath it. Does that make sense?
Dave - I defintitely apply the effect after the duplication. I also checked and I dont have both layers selected.
Rick - I understand the pile of postcards however the one on top is getting tinted when I apply to the one on the bottom??
The layer has an animated mask on it. Then I duplicated it so both layers have the mask. If I tint the one on the bottom the one on top gets tinted. But I just discovered if I tint the one on top the bottom one doesnt get tinted.
But I just discovered if I tint the one on top the bottom one doesnt get tinted.
mmmmm..... it sounds like a minor case of operator error. Just double-and-triple-check all the steps you took, and I'm pretty certain a small goof will show up.
One way to check: if you start this over from scratch in a brand-new comp, does it STILL happen?