My suggestion would be to contact the scheduler and explain that you are attempting to put a route together in order to maximize and justify mileage. Cory Walker schedules their grocery shops in my area. If the other two shops are still on the board,
and there are no limits, you may get your three. Generally, if shops are not able to be self-assigned, a Job Board/Scheduler will not read your mind that you are applying, with a darned good reason, for X, Y and Z, on the same date.