Q: I chose to unlock tasks in Settings, but when I moved the seeding date for an item forward, the transplanting, cultivating, and harvesting date automatically still moved up, too.

A: Here is a quick start guide on "Adding and editing crops" that will help you with this: https://help.seedtime.us/en/articles/5833499-adding-and-editing-crops We demonstrate how this works there and explain it. All those other tasks are dependent on seeding so that is why they move. Tasks that don't have other dependent tasks on them will move individually.