Undecided Question

Troubles with coverup? In some places it makes my skin look gross and flaky?

I have combination skin. I am a teenager so I do have a few pimples, but I take very good care of my face. I usually put a base of face lotion of first, let it dry then apply liquid foundation then powder foundation.

My skin looks yuky, dry and flaky at my t-zone, around my nose and chin. I have tried using a different fact lotion, a different liquid foundation and powder. I have tried loose and press powder.

What I have tried:
Revlon lasting finish liquid foundation
loreal pressed powder
Revlon natual coverage liquid foundation
Mineral loose powder
Sheercover, almay concealer.

I have switched the above around many times.

My skin is usually oily in the places where it looks flaky, I dont think my skin is dry there, i just think the coverup doesnt agree with my skin or something lol.
I dont care if my foundation looks a bit cakey, i would rather be a cake face then a pimple face LOL

So why does this happen?
How can I fix it?
What products would you suggest?