Help with pattern

Left Front
(RS) K across to first sleeve marker (37) sts. Turn
(WS) BO 4 st, P to the end of the row.
BO 2 sts at the beginning of next 2 WS rows.
BO 1 st at beginning of next WS row.

I don’t understand why I bind off 4 sts in the middle of a row. It seems to me it will leave a hole/gap when I knit the next row over it.
Covell Tee on Ravelry

Please help.

it sounds like it it is telling you to start the armhole .The armhole is done in several steps to give it the curve it needs.