OK, so not the Mount Lorne. Is the Katinka Lopi in the same issue of Interweave Knits, Winter 2018? I don’t see it on p36. Is that the name of the pullover or the kind of yarn to use?
I would suggest in general to mark off the number of sts you need in each section before you knit the section. Count the sts. If you have too few or too many, adjust the stitch count on the row before the yoke pattern begins. The incorrect number will certainly throw off the pattern.