Hello! I might be just over-worried here, but I'm starting a new project, holding two strands of yarn, with size 10.5US needles and 87 cast on. When seed stitching my first row the amount of yarn between the two needles progressively grows until by the end of the row I have a good foot and a half of yarn between the needles. Is this normal? Will it correct itself on the next row?
It's probably because you use the backward loop cast on and it does that which is why it isn't really great for beginning a project with, especially with a lot of stitches. Use the knit or cable cast ons, videos for them on the Cast on page, or try the long tailed.
It couldn't have been the Longtail, sorry, it just doesn't do that, or perhaps you're not getting it quite right. The back ward loop is the same as the thumb part of the Long tail, but you put another loop on the needle and pass the thumb loop over it and off the needle. Check the videos to see the difference.
I don't know what then, it is for sure the long-tail cast on, that's the only one I've learned so far (I had to look up the backwards loop to see what it was when you mentioned it.) I learned the long-tail method from this site, and went back and watched the video again just to make sure I'm doing it the right way.
So you think I should try one of the other cast ons?
Oh also, I'm still curious as to whether or not this gap, and big loop of extra material I have at the end of the first row, will correct itself as I keep working or not.
You must not be doing long tail correctly then. There's no way it would create a growing space. The only one I've ever had that happen with is backward loop.