Help with house socks

Hi folks, I’m knitting a pair of house socks and have hit a stumbling block on the way.
The pattern says to cast off (the easy bit) and then knit **stitchesevenly spaced along the top.
Can someone tell me what they mean? It doesn’t make sense to knit after cadting off.

Welcome to KH!
It sounds like the bound off sts at the heel and picked up sts at the top are in two different places. In your photo where is the top of t he sock?
Can you give us a pattern name please or a link to the pattern?