Revlon ColorStay oily/combo. problems?

I just bought it yesterday, and I own the normal/dry one. I decided to get the oily/combo. because I thought it would work a lot better with my skin since it's pretty oily. So far I've been wrong. It's been doing pretty much the same thing. It oxidizes and when I look in the mirror after school, I see that I look pretty oily. How I apply it is, I put on moisturizer and wait a while, then I put on some concealer, and then I put on the foundation with a sponge. Is there any way I can make it look better, longer? When it's first on, it looks perfect. It just gradually gets oily which shouldn't happen. I'm not sure if it's because of the new formula(says 24 hours on the cap) or what, but this is depressing me.
 
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