You can paint right over the Behr Sateen finish with an acrylic satin, primer isn't necessary. Choose a paint similar in quality or better to the Behr Premium Plus that you used.
I have noticed some discussion online about this paints sheen being too glossy, more like a semi-gloss. All paints have a cure time, 2-4 weeks, before their true sheen is achieved. It's possible it could tone down a bit in a couple of weeks.