Dear Rat,
Thank you for taking your time to write about the issues with your American Standard product. Quality and customer satisfaction are always a priority. We apologize for any inconvenience you have experienced with your new American Standard Shower base. As you know the base is required to be supported along the entire bottom using mortar and we do recommend using a couple bags of mortar to insure proper support. The base is supposed to be true and level and not warped so if possible please contact the American Standard Whirlpool/Acrylic tech team to discuss possible options. A photo or two showing the issue will be helpful.
American Standard Whirlpool Tech/Acrylic Team