Lace pattern stitch help

Hi: I’m trying an easy lace cardigan with a pattern stitch of 6 sts + 2. Instructions say for guage swatch cast on 26 sts. However, when I do this by row 3 I’ve somehow lost a stitch and on the next row another. I’m doing the yo’ s and knitting/purling them on odd rows. What am I doing wrong? HELP!

How are you off? Check how you’re doing the YOs, they’re just wrapping the yarn around the needle, not wrap and knit a stitch too. You might be forgetting a YO at the end of a row. What’s the pattern?

Usually you are doing yarn overs coupled with a decrease to keep the stitch count even. Check carefully that you are doing a yarn over for each decrease or you will come out short.