Charlotte, we can have imaginary houses for yarn and knitting in the same neighborhood! Heck, we can own a whole state!
Another thought on getting it right: Make sure the stitches as you're looking at them to work them look like stockinette. The old "knit the knits and purl the purls" thing. Such a simple idea, I never think of it when I need to do it!
I should never overestimate my basic arithmetic skills.