Notes taken from JeniBaker’s Daybreak project notes:

To keep in track of the “halfway” I followed this:
The first column of the table shows the number of stitches you will have at the end of each 4-row repeat. The second column shows the number of stitches to knit to get you halfway to the marker on the next Row 1 of the repeat:
25 | 5
37 | 8
49 | 11
61 | 14
73 | 17
85 | 20
97 | 23
109 | 26
121 | 29
133 | 32 (end of section 1 for size S)
145 | 35
157 | 38
169 | (end of section 1 for M and L sizes)
e.g. after the third 4-row repeat you’ll have 49 stitches on the needles, so on the next Row 1 of the repeat, when it says “knit halfway to marker”, you need to knit 11 stitches.