re:So when I cast on, I'm automatically getting stockinette stitch, which I thought was weird.
that because stocking knit stitch (or any knitting "stitch (pattern)" is named by OUTPUT, not by process!
stocking knit stitch =All knits on one side of work, all purls on the other side of the work.
if you knit flat (work a row, TURN, work a row, TURN,..)
you need to alternate work Knit than Purl rows to get all the knits on one side.
but if you work in the round, and work a needle, CRANK, work a needle, CRANK, (not really turning work but cranking it to the right!) you are just need to knit to get stocking knit,(since you never really TURN the work!
K1, P1 can be seed or 1 X 1 ribbing (depending on, the number of stitches (even or odd to start) and the method, flat or worked in the round!
but seed looks like seed no matter how its worked, and 1 X 1 ribbing looks like 1 x 1 ribbing!
the OUTPUT is the determining factor..
(you can, you know, make garter stitch (worked flat) by purling every row (not just by knitting every row!)--its the same garter stitch as knit every row.. ONLY the knitter knows for sure how it was done!)