What am I doing wrong?

I can never find a foundation that works with my skin. I’ve just bought jane iredale mineral powder and had high hopes for it but two hours in and I’m so shiny and oily. At the end od the day I looked awful.

I put spf 50 and their primer than powder and their spray. Am I doing something wrong?

I hoped that with being 30 I wouldn’t have to deal with constantly being oily but I guess not.