You're updating "Stewardship", which is a going to be one of 3 things:
c) feature set
If I had to guess, you probably started with a featureclass as input. That is, a pointer to something on disk. When you published you probably accepted the defaults in the Service Editor and the featureclass gets mapped to FeatureSet. At this point when you run it, its just a best guess if you've given it features into the featureset when you ran.
This answer is more of a question I suppose, there is a lot of information you need to provide or go back and double check.
- What are you trying to update in the service? User defined data (feature set) or a featureclass (which would be set to constant)
- Have you checked the input parameter in the service editor to make sure it matches what you want
- Does your published service look the same as the tool before you published it when you consume it in ArcMap. (this answer really determines what has happened when you published)
- If you're using a featureclass which is hard coded, have you set the datastore, so it isn't making a copy of the data into the arcgisserver directories? Along this line, how do you know that the field isn't being updated, what data are you looking at? Are you certain that data is the data the GP Server is acting against?