Fix: wrong roll count (units mixed)
Mixing centimetres and inches silently ruins strip math. Lock one unit and recalculate.
Short answer: Pick cm or inches for every field. The planner remembers your unit preference. Open Cut plan, set the unit once, re-enter sizes, then export the cut list.
See Metric and imperial.
Same wall and same 10.05 m roll: 320 cm fits 3 times (960 cm) with 45 cm left on a full roll. Eight strips still need 3 rolls, but the leftover on the first two rolls is only 45 cm, not 237 cm. The third roll holds the last two strips and keeps about 365 cm.
Use half drop for that default. The drawing offsets the guide lines on alternate strips. This is a valid layout, not a claim that no shorter layout exists.