If shortcode has been added to display trips and trips are being displayed randomly then please follow below given steps to get rid of the problem.
First of all, please once verify the issue by deactivating all third party plugins as third party plugins conflict can be one of the leading causes for the uncertain behavior of your site.
If everything is fine regarding the third-party plugin, please add a shortcode under the shortcode block on the page (edited) where you are willing to add a shortcode.
Also, if above mentioned steps don’t work for you, please add shortcode under the custom HTML block and preview the shortcode and update the page.
Note: Make sure that WP Travel plugin you have used is of latest version.
If you have any queries, please submit it to our Contact page.