My live site is avelim.co.il
My tsest site is avelim.org.il
They are duplocates with one difference - the live site has version 1.7 of your plugin and the test site has 1.8.2
1.8.2 has issues when uploading large images. They appear in several places and look strange.
I would suggest you upload a large image to the same post on both sites and see what happens:
Can you please fix this?