GG, thanks for the link.
The chart does look funny because it it holding spaces in the center and edges for the increases that occur. Don't work the blank boxes. The pattern for the chart is given in the areas that have alternating rows of which and pale blue background.
You should have 159sts at the end of row 76. Work 2 edge sts, start the chart, repeating the boxes outlined in red 5 times. That'll bring you to the center stitch. Work that, then skip over the blank boxes to the
. Work to 2sts from the end and finally do the 2 edge sts.