Why is my clipping mask getting lighter?
Okay, I have been fighting with the clipping mask on this project.
What I am trying to do, is make this yellow circle to be inside of the gray part. Like, I want to keep the shape of the gray part and the yellow circles gets cut off by the gray.
Here's the image before the mask

Heres the image after the mask

This is the effect I want, but why is it getting so pale? I am not changing the colors or anything. I am making a copy of the gray part (so I have 2) and make the mask with one of the copies, the one on top of the yellow circles.
These are the layers before the mask

And this is after

I don't understand if I am doing something wrong. The gray is just rectangles that I "merged" in the pathfinder. The yellow was 3 circles I did the same thing with. One ring has a "soft light" overlay over it, the dark ring has an opacity of black. When I am making the mask, the yellow is merged.
I don't know what I am doing wrong. I don't understand why the yellow is getting darker. Could someone explain what's happening?
Thanks in advance.