You requested that the partition start at 0 MB. Parted tries to find the closest valid location within half of a MB, which is at 16 KiB. That is not aligned to a multiple of 1 MiB. You might use a start of 0% instead, which will give a large enough search radius to to snap to the optimal alignment.
You requested that the partition start at 0 MB. Parted tries to find the closest valid location within half of a MB, which is at 16 KiB. That is not aligned to a multiple of 1 MiB. You might use a start of 0% instead, which will give a large enough search radius to to snap to the optimal alignment.