Are you using any other topicals besides aczone? If you stopped for a week and your skin was still just as oily, I don't think aczone was the problem. Was your skin oily before you used aczone?

I was using Differin as well which doesn't list oiliness as a side effect. My skin has always been a little oily but got more so after going on Microgestin, and then seemed to get even oilier after the Aczone but I had also just stopped using the Regimen with the on the spot Neutrogena stuff which dried the crap out of my skin. I also had gone off the Microgestin a couple weeks before switching from the Regimen to Differin/Aczone so maybe my skin is really just this oily as my hormones are readjusting :/ Ugh so unpleasant!