Tempest Sleeves

I am knitting the sleeves for Tempest and having a hard time understanding the pattern:

I am on size C and have 48 sts. I have knit the first 4 stripes (48 rows) and am at the increases. There is a note that some sizes have increases worked on both RS and WS rows, but I cannot figure out which sizes. From the stitch count, I am not doing that for my size, but want a second opinion.

Thanks!