So I deleted an order list from a schedule that contained one line that was not used in any other order list, and because I cloned it like this, this line was also the line that was used for the auto schedule color. After I deleted this order list, the schedule was still shown under the said line in the schedule list and still had its color even though the line was no longer used by the schedule.

I just had to change one order to update all this and have the good schedule color and position in the schedule list.