pfSense

If you uncheck the box that tells the wizard to create the rules on the last step, it shouldn't make them. If you unchecked that box and the rules were still made - then it's a bug, otherwise it is just doing as it was told, to make the rules.

It would be counter productive to search through the rules and try to match the previous automatic rules, they could have been changed by the user in any number of ways.

I probably did leave it checked, and users certainly can change the rules. Still it might not hurt to do a quick scan and see if the same rule already exists and if so not re-add it.