Trying to export Image from ps express and it keeps saving larger then my settings

I have the desired pixels at 1600x1600 and it keeps tripling the dimesions 4800x4800 when i save through the export function it does this with all dimmesions tripling the size on all so if its 1920 it saves as 5760x5760. i just want it to save as the dimension im am trying to save it at. i am using an iphone 16 pro max and an iphone 12 mini is doing the same thing.  i am using the latest photoshop express and am signed into my acount with premium