When you increase in a pattern, you expand outward in pattern if that makes any sense.
I would increase on the purl rows by purling into the front and back of the end stitches. On the pattern row, work whatever stitch would be there if you were working a full pattern row. So
pkkkkppppkkkkppppk would be the next pattern row, and after the next increase you'd start with 2 purls and end with 2 knits, etc.
"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