Where are you making the price adjustment? If you make the adjustment in the ingredient profile, then you will need to update any existing recipes which can be done by clicking on 'update prices' on the design tab of a recipe.
If you are making the price adjustment in a recipe, then you will need to click on 'save item' for that item within the recipe to be saved into the ingredient profiles.
The default costs are place holders and do not represent pricing for an item around the globe. I update pricing annually based upon my costs from the previous year and also update the specifications for the materials I purchase based upon the COA from the manufacturer, specification from the manufacturer or distributor web site, or information from the packaging.
Like much in BeerSmith, the profiles and process parameters are meant to be customized to meet your specific needs.