Hi Fiona,
You are using the correct speaker widget within your website. The second one you are seeing will be removed shortly to remove any confusion!
As for the scrolling functionality, that is not from our standard speaker widget. Your website has custom coding enabled that is producing the scroll functionality, so I would recommend working with whoever applied that coding to correct the left side scroll issue!
If you remove the code impacting the speaker widget, it will remove that horizontal scroll and display all speakers vertically.
Hope this helps!
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Madeline Mason [Designation]
Customer Success Manager
Cvent
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