Sorry to hear of the problem you are having.
I could confirm it on your shared site.
Could you please make sure you are using below latest version of theme and temporary disable cache you are using on your site?
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I have tested it on my test site and it’s working fine for me using latest version of Gillion theme.
Are they sticky posts?
Would you mind if i log in to your site and do some troubleshooting? If this is ok then could you please share me your site log in details privately by adding them in the box having text “Click here to share private content. Only you and forum moderators will be able see it.”?