Hi Karen, you could create a smart campaign that says something along the lines of, if acquisition program is incorrect program that was set up, then change acquisition program to your original program. You can also either re-upload the list that they uploaded and just assign it to the correct campaign, or you can just run smart campaigns to switch peoples membership. Changing membership can also be done by highlighting campaign members and going to Lead Actions > Programs > Change Program Status.
Overall, you can't merge the programs, but this is definitely something that can be fixed to still see net new leads.