As I was teaching a sock class, my student was knitting continental AND in the back loop. Well, what happens when you knit in the round AND knitting continental in the back loop? Your stitches get twisted. When you knit in the round, your end result will be stockinette. How do you identify your stitch? Stockinette looks like a "V". What happened to this customer is that he (yes, he) was constantly knitting in the back loop and the stitch got twisted. Well, I finally figured out that he had to knit in the FRONT loop to get his stitches straightened out.
So, if you are a continental knitter AND you knit in the back loop, just remember that when you're knitting in the round, knit in the front loop!!!
Happy Knitting, my friends!!