Got a bundle that's supposed to be for Transaction Body fields but it's bringing in a bunch of non-related records. Tried to edit the bundle to remove the unwanted records/lists/etc but when I hit 'Next' and review the objects are still there. What gives? Thanks

Somehow they're linked to new fields probably through a custom form. Try using the copy to account option instead (assume you're migrating from a sandbox).

Won't work that unfortunately. Migrating from production to production ;-(

you can use copy to account across production environments if it's enabled and you have enough permissions in both instances.