Item Master Form fields is Missalign

i dont now why, i didn’t change the feild placement, but my 2nd section fields have been moved to first section. I have about 7-8 custom fields inside 2nd section and all are under the 1 section now. is it due to backend coding, Script, Please explain ??
It can happen bcuz of custom code ?

Check Customization form align fields in second section and check if it is working

in customize form the alignment also change, the feilds are working