This pattern gives instructions for both one colour vest and two colour vest with capped sleeves.

The cast on row for the second size is incorrect. the row should read:
Cast on 5 sts using the cable cast on method, cast off 2 sts, slip st on RH needle back onto LH needle (3 sts now on LH needle) rep from * to * until there are 126(135:141:147:156:159) sts on RH needle, cast on 2(0:1:2:0:2) st(s). (128(135:142:149:156:161) sts)