A family of Microsoft word processing software products for creating web, email, and print documents.
By default, Word doesn't add punctuation when you insert a footnote. Could you tell us some more about how they were initially created? Were the brackets added by a macro, for example?
To let us see what you see, please display nonprinting marks (click the ¶ icon on the Home tab), take a screen shot of a relevant part of your document and then paste the screen shot into a reply in this thread.