If it's not actually mobius knitting which as Jan says, knits from the center out to both edges at the same time, then you just need to put a twist in the sts. You know how they always tell you not to twist the sts when you join them to knit a hat or tube in the round? Well, in this case, line the sts up with no twist and then deliberately introduce a twist into the cast on sts. See the video under Free Videos at the top of the page, Advanced Techniques, Circular knitting. Do as the video shows but before joining the sts, twist the sts once around the right needle.