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This is the form that you're working with right? https://www.jotform.com/50496524305151
I've checked the form and found out that there are 2 notifiers: Travel Request form and Notifier JM.
In the Travel Request form, I saw that there are 2 recipient's email and it is separated by semi-colon (;). It should be separated by a comma (,) then a space. Please refer to this guide on how to send notifications to multiple recipients.
Example: email@example.com, firstname.lastname@example.org, user3.domain.com
Hope this helps. Let us know if you need any help.