Sorry for the late reply. This shouldn't be possible because we do keep a list of post which has been posted in the table so that there is no duplicates. Anyhow I'm afraid I will have to debug this in your site as we can't replicate this here. I just wanted to warn you about the test post I'm going to make that will end up in your Facebook or Twitter. Is that ok with you? Though If we have access to your Facebook and Twitter I can delete the posts immediately after posting it. Please advice.