UE 5.1 3840x2160 Rendering shows up as 4096x2160 image seq files and cant import to premier pro HELP

I’m rendering a 4k sequence in movie render queue with 3840x2160 dimensions and the resulting sequence files are 4096x2160. Also, i cannot upload this sequence to premier pro the button stays greyed out but all of my other seuqnces before this work fine. please help.