Hey Rai! I looked into this and I know why the centering isn’t working on your image, but need to figure out how that can be addressed. Part of it could be addressed by using the mailchimp sized image which is created by the plugin, so the image would be full width, but I do need to do some investigating on my end for smaller images.
I’ve put your updated feed in a MailChimp template on my end, and the alignment and margin on the image are working as they should for me. Can you double check your email preview, or check if your email has any custom styling that might be overriding the plugin? The last is less likely, as the image has inline styling, which is very difficult to override. Here’s what one of your images looks like in the raw feed:
<img width="300" height="210" src="https://www.comunidadkundalini.com/wp-content/uploads/2016/04/planificacion-de-vida-300x210.jpg" alt="Cómo planificar tu vida" align="left" style="margin: 0 20px 20px 0" />
The align="left" style="margin: 0 20px 20px 0"
are added by the plugin to handle the alignment and padding, and they’re correctly in place, so I’m not sure what could be messing them up.