I think I would increase in the center of the 12 stitches between the last two markers.
I can't seem to get into Knitty to look at the pattern.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry