Seed stitch is a real pain in the bum for newer knitters. It should be simple but unless you keep a very careful count, you need to be able to recognise the difference between a knit and a purl stitch visually so you know what stitch you should be doing next.
If you're doing seed stitch on an odd number of stitches it's easier because every row starts with k1. If the bands have an even number of stitches you will have to remember which row you're on as well - extra bum-ache.
And on top of that, if you're not used to having to move the yarn from behind to in front of the needle between every stitch it can be very slow going. All in all, I've stopped advising our newer Woolly Hugs knitters to try seed stitch.
I would start off with a test swatch where you just try to master the seed stitch bit. if you cast on, say, 11 stitches you should find you can do k1, p1 all across the row and end up on a k1. Same thing on the next row and you should start to see how the pattern develops.
If you want to post just the bit of the pattern instruction that talks about how to do the seed stitch, we can advise further. This shouldn't break any copyright - or you could discuss it on Ravelry where the author can see it. We have a group of our own there.
I will say it seems quite possible the pattern is wrong - no-one has knitted yet except you.
Finally I would say as well there are a lot of free patterns on Rav. That one is perfectly nice but I'm not sure I would have shelled out $5.50 for it. Do look around for ideas. But first off let's see if we can get you started on this one!