The way your receive work orders on the Sunsong Ranch farm was changed recently which may cause some confusion. If you've been doing your work orders you probably have logged in and had the second work order in the series automatically pop-up in your quest list. This has been changed, and from now on you’ll receive the quest when you start harvesting your plants, or when you interact with the drop-off crate.
Enjoy farming for rep! nyuknyuknyuk