Smush Pro has made no difference to the speed of my site. It's now WORSE!

I have just bought a years membership because my site speed was 31/100 and the main issue identified was the images. I added the SmushPro and smushed 9011 images saving around 975 mb. I retook the site speed test hoping for some fabulous results and now my site speed is 30/100. Seriously!!
Could you take a look and tell me what the problem is because as far as I can see the plugin has not achieved what I set out to achieve.