Images still need to be Optimized

Hi There,

I have already run many times WP Smush Pro and Hummingbird.
However it still saying that some images (the ones that I have already optimized thru WP Smush) they need to be optimized.

Since I run WP Smush many times, I thing Hummingbird might detected the images already optimized, no?

Here it goes:

BENCHMARKS

Optimize the following images to reduce their size by 696.2KiB (96% reduction).

Compressing and resizing http://www.mestre-cervejeiro.com/wp-content/uploads/2016/11/img_7532.jpg could save 158.2KiB (96% reduction).

Compressing and resizing http://www.mestre-cervejeiro.com/wp-content/uploads/2016/11/img_7500.jpg could save 143.5KiB (96% reduction).

Compressing and resizing http://www.mestre-cervejeiro.com/wp-content/uploads/2016/11/img_2902.jpg could save 142.8KiB (96% reduction).

Compressing and resizing http://www.mestre-cervejeiro.com/wp-content/uploads/2016/11/img_7479.jpg could save 128.5KiB (96% reduction).

Compressing and resizing http://www.mestre-cervejeiro.com/wp-content/uploads/2016/11/img_7406.jpg could save 123.2KiB (96% reduction).

Please could you help me?

Thank you,

Daniel