how can I fill out the fields separately without matching them?
Would you provide more information about the problem?
What is the name of the app? Is it Acrobat Reader, Fill & Sign, or something else?
Is it a desktop app on a Windows/Mac computer or a mobile app on an iPad/iPhone or Android tablet/phone?
What is the version of the operating system on your computer/device?
Are you trying to fill out a PDF form in a web browser (e.g. Safari, Internet Explorer, Chrome, Firefox) by any chance?
If you can post a screenshot, it would be very helpful.
I see this a case of duplicate field names. For example, in a pdf form you have 2 Text Fields. If the name of both the fields are same then it will duplicate the data as well. In this case, please go to Form Editing Mode using Acrobat DC on your PC/Mac and give different names to the fields.