Numbered line changes code unexpectedly

as a beginner level coder here i am trying to make chess game board at
OpenAI API
if i write like this :

1. 8 x 8 times 60 px black and white square
2. border 2 px
3. put letters under each column , centered to each square, move down 12 px, font size 20 px

this creates letters inside each chessboard square so obvious i dont want this
but if i write lines like this (only deleted part “3.”):

1. 8 x 8 times 60 px black and white square
2. border 2 px
put letters under each column , centered to each square, move down 12 px, font size 20 px

it makes chessboard letters as it should be
i think you can test by copy past and see result
dont know if it is a bug but it is strange :face_with_raised_eyebrow: