Double Posts in search results

Hello everyone,

I have been working on a site for several months and yesterday i moved it succesfully to another host. Post are shown just fine while browsing the site, but when it comes to searching, every post content is doubled – not the title only the content!

Here you can see an example of what i mean: http://genatiparadosi.gr/whome/en/?s=pasta

I have tried a bunch of fixes (clearing cache, delete and re-import, deactivating plugins, trying out some plugins for duplicate content etc) but nothing really works.

All new posts also are showing twice in the search results…. and this is when i realised it might not be a “bad import” issue.

Any thoughts????
Thank you in advance for your time 🙂