Images left unsmushed!

Hey guys,

I have run Hummingbird and it's working sweet - already 8 points improvement!

I am scoring dismally on my images though (41!) and WP Smush Pro seems to not really be helping. I am being told that al files are optimized by WP Smush Pro, however my site speed test gives a long list of unoptimized images (image attached).

Any ideas?