Pattern help - Colchicaceae shawl

I think this is a new record for getting stuck - I can't finish the first damn row!

I'm working the Colchicaceae shawl, which calls for you to CO 345 stitches. The first row of the lace chart is as follows:

k3, yo, k2, p2, k2, p2, cdd, p2, k2, p2, k2, yo, k3

So I started repeating that, but no matter what I did I never came up with an even number of repeats; I always ended a little over halfway through the chart row. Then I noticed - the chart is 25 stitches, and it's mathematically impossible to evenly divide 345 by 25!

WTF is going on here? I checked other knitters' projects on Ravelry, and there's no mention of a misprint in the chart or the number of CO stitches. In fact, everyone keeps on talking about how easy the pattern is. -_-