If it offers you any consolation, I had an almost identical experience albeit on a lower dose. I realized that a month in, I thought I had become "immune" to acne due to the drug and began indulging in food/lifestyle habits I normally refrained from due to how it would affect my skin. Surprise, surprise, it still did. Second, and I'm sure you realized from other posts and logs but accutane generally relies on a long-term timeline compared to other treatment modalities and literally each individual experience varies, be it conspicuously or more subtley.