I found this on Ravelry, in a knit along group dedicated to Yarnissima patterns.
Here is a quote:
"For anyone who is wondering about the front…
Because the central front pattern is a different number of repeats from the side cables, your front section may not line up as per the chart 6. Mine doesn’t. No big deal…by the time you have reached that far, you should have the hang of the diagonal cables. Just continue the front pattern as it goes and carefully run the diagonal cables across it.
You will notice that on CHART 6 for the front foot cross, there are a couple of increase stitches on the left side of the pattern and a decrease on the right. These increase/decreases are necessary as the diagonals are not centered with the front panel pattern. The increases/decrease will help to center the diagonals. You don’t have to be on the exact same center pattern repeat in order to do them. Just place them directly inside the diagonal cables as per the pattern and on the same row number as indicated on Chart 6 and all will be well."
This was advice from Knitpickin on Ravelry. Knitpickin is my hero.