Puppy Hand Puppet pattern and question

[willowmom]

Hi folks,

I'm a new knitter and I'm trying to make this puppey puppet <http://patriot.net/~annette/patterns/puppets/> It looks very easy, except that I don't understand the pattern. Here are my problems:

See Puppet One
Read under Upper half of puppet, it says,
"Continue with next 13 sts, complete row, at end SCO 1 st (14 sts).
Work next row as est, at end SCO 1 st (15 sts)"

What does that mean? What does the SCO 1 sts mean? I think SCO stands for Single Cast On, but how does casting on related? You cast on at the beginning. Is there a way to cast on again?

Please help!!

[HeatherFeather]

I think SCO stands for Single Cast On, but