Strange route for survey (Grid) Route


I am currently using Mission Planner 1.3.70 and during planning the survey route for the trial and training, I found that the route is quite strange then before. Until last day of planning, I found the route with points of sequence however, from next day, the route begins to make skipping certain legs and cover later.

I am attaching the screen photo of the route for your information.

Is there anyone to help or advice on this?

Thank you~!!

you changed a setting - change alternate Lanes