check in your code here the images are each in their own div listed below
<div class="promo_slider auto_advance">
<span class="promo_slider_time_delay" style="display:none;">5</span>
<div class="panel panel-1">
<span class="panel-title" style="display:none;">Time can add up when you do things efficiently</span>
<div class="promo_slider_background_image"><a href="https://castellanfinancial.com.au/promotion/time-can-add-up-when-you-do-things-efficiently/" target="_self"><img width="650" height="270" src="https://castellanfinancial.com.au/wp-content/uploads/2012/10/doing-own-tax.jpg" class="attachment-full wp-post-image" alt="Happy couple" title="doing own tax" /></a> </div> <div class="promo_slider_excerpt">Let me tell you that doing your own tax return, if there’s any complexity about it at all, is not an efficient use of your time.</div> </div>
<div class="panel panel-2">
this is the image part of that
<a href="https://castellanfinancial.com.au/promotion/time-can-add-up-when-you-do-things-efficiently/" target="_self"><img width="650" height="270" src="https://castellanfinancial.com.au/wp-content/uploads/2012/10/doing-own-tax.jpg