First, welcome!
There can be a variety of reasons why the numbers don't match up. Let's start by looking at the more obvious things:
(1) make sure you are looking at OG and not FG.
(2) check the type of recipe in the design tab. It should read "all-grain" and not "extract". This is probably the most likely setting that can get overlooked.
(3) Are you using some of the stock profiles that came with BeerSmith or did you customize the equipment profile to match your specific set up?