Help!! confused on Sleeves(baby cardigan)

[kacyann]

Hello,

This is my first cardigan. the pattern is telling me to place marker 4in down from shoulder on front and back. From RS, pick up 26 st between markers. Work in garter st.

OK hear is how I am confused. I am picking up st on just the front of the cardigan, knit those then pick up 26 more on the back Knit those then sew to make sleeves ?????

http://www.lionbrand.com/patterns/70038.html

[MerigoldinWA]

Sleeves
Sew shoulder seams. Place markers 4 (4, 4½, 5) in. [10 (10, 11.5, 12.5) cm down from shoulder on Front and Back. From RS, pick up and k 26 (26, 30, 32) sts between markers. Work in