KP Crayon Bathrobe confusion!

Let me summarize first. I knit the lower body… at the top I set aside 10 stitches partway in on each side where the underarms of the sleeves will go. Those are on holders, but the rest of the stitches are "live."
Then I am to knit each sleeve in the round, bottom to top. At the top, I am to set aside the same number of stitches (10) for each sleeve.
With me so far?
Now I’m trying to figure out the next step, joining the lower body and sleeves. Here’s what the pattern says:
[I]

[I]Using a 32" circular needle, knit along the right side front of the body. Place a marker on your needle. With the underarm stitches facing each other and being left on their yarn holders, knit along the remaining sleeve stitches. Place a marker on your needle. With the underarm stitches facing each other, and being left on their yarn holders, knit along the remaining left sleeve stitches. Place a marker on your needle. Knit along the left side front of the body.[/I]
[/I]

Whaaa?? :?? I’m not sure I quite understand what they’re trying to say. Can anyone help please??

It sounds like you’re to leave them on the holders, probably to weave together later.

What does it day to do with them at the end of the pattern?

It says you will Kitchener them together after you’re done. I’m really more confused about the joining part though… I have the body on one needle and the sleeve on another - how do they join? Do I just knit them together? How does that work with a flat lower body and a sleeve in the round?

It doesn’t sound like you’re joining in the round at all, and the sleeves will now be knit flat with the body.

I have knit sweaters from bottom up in the round before. You will be knitting the front of the sweater to the sleeve marker, then knit the sleeve stitches onto the sweater needle minus the stitches at underarm which will be on a stitch holder. Then you will knit the back stitches of the sweater to the next sleeve marker and knit the other sleeve stitches onto the sweater needle and then knit across the other side of the front. You will end up with all of the sweater on one circular needle. You then continue to knit as you did the body of the sweater following the decreases to shape yoke and neckline.

Oh, I think I misread your “join” question.

It sounds to me like you knit so many stitches off the body needle, then knit off the sleeve needle. Just put the body needle in your left hand, then put the sleeve needle there when you reach that point.