I've been mulling over this pattern and though I'm certainly not an expert on lace, I can see your dilemma on the first right hand side edge. You will end up with three, but only need two for the next row.
What caught my eye, though, is what she says in the paragraph between the beginning rows an th finishing rows, "Also, you may have to adapt the way you keeep the growing edges in pattern as you go on, buy by then you should have a good feel for the pattern!"
So what's happening may be normal for this pattern and you'll have to adjust as you go.
"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