I am doing a hat on circular needles, not used them before. Pattern is 1x1rib for 4 rows of 99 sts. It says to cast on and do the first 3rows on straights then 4th etc onto circs. The first few rows look fine, ribbed as pattern, but beyond this I end up with moss stitch from the point where I transfer to circs, despite continuing the rib pattern and checking the ribbing is facing inwards so not twisted. I've started over 4 times, and I can't work out what I'm doing wrong. I have the right number of sts and am starting and ending with the appropriate k or p.
Can anyone help please?
TIA