Hi Ernest,
My humblest apologies! I have just checked – and strangely enough the Adv Gallery Block does not show up those duplicates at all from across the media library images… which it should do – as it would have picked up the issue straight way – without having to “leave” the page I am working on! – so didn’t think that was the problem – I usually always delete a batch from bottom of media library in bulk as I enter a new batch at the top – so somehow didn’t check the top end as well – too many late nights!!!
Feel free to delete this post – since it doesn’t add value to your help database at this time!
PS – your search plugin works really well – and I should hopefully be adding some new sites before long…
Kind regards – and best wishes for 2023!
Sally