If you have multiple campaigns set to Display on the same webpage then your notifications will not work properly.
In the case where multiple campaigns share the same Display url, only the 1st campaign created will display.
How to fix this issue
Please make sure that each campaign is set to display on separate URLs. Meaning we can't have multiple campaigns set to display on the same webpage.
Here are two tips to help you moving forward :)
Keep in mind that you can activate multiple notification types in 1 campaign. This is the best and easiest way to display multiple notification types on the same webpages.
You can display individual campaigns on multiple URLs. Just make sure that there is no Display overlap with another campaign.