Bare Minerals Advice Please?

So I bought the matte foundation on the weekend and have noticed my skin has been more oily since I've been using it, but I'm not sure if that's just a coincidence with the weather suddenly going warmer. I'm also not sure about the coverage, I think it looks like it's making my skin look dry as well as oily at the same time?! Do you think changing my moisturiser or using a primer would help it to apply better as I only use a moisturiser at the moment? Thanks!