Hummingbird Performance Statistics - Dropped rather than improved post 'optimisation'

I have installed hummingbird on my website, before i completed some of the requested optimisation actions my performance score was 50... After I smushed, compressed and apparently optimised... my score dropped to 49. Both with Hummingbird and google pagespeed. Does that mean Hummingbird has slowed my website down rather than optimised? I am rather confused.