Home Slider Increasing Image Size

[AndySchmitt]

Hi, 

 

I have the Home Image Slider addon installed, and it is working very well, except for one thing.
My 3 home slides increase in size a lot.

 

You can see those images at http://alurabeautyshop.com/ home page.

The first slide: "Hypnotic Poison", was optimized before the upload. The original size is 119kb. 
But after upload to Home Slider module, it stays with 757kb.

 

The second slide: "Calvin Klein Euphoria", was optimized before the upload. The original size is 233kb. 
But after upload to Home Slider module, it stays with 1.39MB.

 

The third slide: "Gucci Bamboo", was optimized before the upload. The original size is 202kb. 
But after upload to Home Slider module, it stays with 1.29MB.

 

The original file sizes combined have 554kb, but it jumps to 3.44MB, an increase of more than 500%.

 

Why does it happen and how can I solve this?