Just tried entering your numbers and got the same issue. My assumption is that since "match original gravity, color and bitterness" was checked off when you scaled, the software lowed the base grain for the higher efficiency, but then needed to increase the specialty grain in order to keep it at the same SRM
Member of the Metro South Homebrew League (Mash-Holes) - Weymouth, MA
Primary - Annie's Atomic Amber
Secondary - Empty
Kegged - Dortmunder Export
Bottled - California Common (2nd place, 2014 OSHC).