You don't work 2 rows on the WS. You work a RS row, then a WS row, then a RS row, etc. It's just giving you information as to which is the RS because later there may be instructions to 'end with a RS row' because then you'll do something else on the WS. You don't make the sts any different, it's just there for information.
Don't overthink it, just cast on, work the first row, mark it as the RS with a safety pin or paperclip or other piece of yarn, then work the following rows in the pattern.
sue- knitting heretic