To have nice change of color, when knitting zig-zag stripes in the round, the beginning stitch has to be the centered knitted stitch between the two increases.
1. In the first round,. make one stitch left, knit the first stitch and make one stitch left, continue working around following the stitch pattern (here k3, sl1, k2tog, psso, k3, m1 r, k1, m1l).
2. At the end of the round, knit the last stitch (this is the first m1r, you worked at the begin of the round.
3. Knit 1 round to the marker
4. For the next increasing/decreasing round, repeat from step 1 to step 3.
Et voilà, no Jog in your zig-zag stripes!
Happy knitting :)