I think you need to do this in two places, the batch size under the design tab of the recipe will scale the grain bill ,hops, and style comparison to a 2 gallon batch. You also need to make sure the batch volume is set correctly under the equipment profile as that determines the mash water volumes. That's probably where the misstep occurred. Also, make sure the recipe design is set to use the proper equipment profile.
You'll have to just laugh this one off. You were probably wondering why you were using so much mash and sparge water for a two gallon batch.