diff --git a/comicapi/genericmetadata.py b/comicapi/genericmetadata.py
index 060c461..cf8c4cc 100644
--- a/comicapi/genericmetadata.py
+++ b/comicapi/genericmetadata.py
@@ -268,8 +268,8 @@ class GenericMetadata:
             return new
 
         # Create dict for deduplication
-        new_dict: dict[str, Credit] = {f"{norm_fold(n['person'])}_{n['role'].casefold()}": n for n in new}
-        cur_dict: dict[str, Credit] = {f"{norm_fold(c['person'])}_{c['role'].casefold()}": c for c in cur}
+        new_dict: dict[str, Credit] = {norm_fold(f"{n['person']}_{n['role']}"): n for n in new}
+        cur_dict: dict[str, Credit] = {norm_fold(f"{c['person']}_{c['role']}"): c for c in cur}
 
         # Any duplicates use the 'new' value
         cur_dict.update(new_dict)
@@ -477,10 +477,13 @@ class GenericMetadata:
 
         credit = Credit(person=person, role=role, primary=primary)
 
+        person = norm_fold(person)
+        role = norm_fold(role)
+
         # look to see if it's not already there...
         found = False
         for c in self.credits:
-            if norm_fold(c["person"]) == norm_fold(person) and norm_fold(c["role"]) == norm_fold(role):
+            if norm_fold(c["person"]) == person and norm_fold(c["role"]) == role:
                 # no need to add it. just adjust the "primary" flag as needed
                 c["primary"] = primary
                 found = True
diff --git a/comictaggerlib/cli.py b/comictaggerlib/cli.py
index b299304..6e7aa2c 100644
--- a/comictaggerlib/cli.py
+++ b/comictaggerlib/cli.py
@@ -29,7 +29,7 @@ from typing import Any, TextIO
 from comicapi import utils
 from comicapi.comicarchive import ComicArchive
 from comicapi.comicarchive import metadata_styles as md_styles
-from comicapi.genericmetadata import GenericMetadata
+from comicapi.genericmetadata import GenericMetadata, OverlayMode
 from comictaggerlib.cbltransformer import CBLTransformer
 from comictaggerlib.ctsettings import ct_ns
 from comictaggerlib.filerenamer import FileRenamer, get_rename_dir
@@ -259,7 +259,7 @@ class CLI:
                     logger.error("Failed to load metadata for %s: %s", ca.path, e)
 
         # finally, use explicit stuff (always 'overlay' mode)
-        md.overlay(self.config.Runtime_Options__metadata)
+        md.overlay(self.config.Runtime_Options__metadata, mode=OverlayMode.overlay)
 
         return md