diff --git a/rascal2/widgets/delegates.py b/rascal2/widgets/delegates.py
index b776803..d0f204a 100644
--- a/rascal2/widgets/delegates.py
+++ b/rascal2/widgets/delegates.py
@@ -91,14 +91,13 @@ def createEditor(self, parent, option, index):
         layers = self.project_widget.draft_project["layers"]
         widget.addItems([layer.name for layer in layers])
 
-        current_layers = index.data(QtCore.Qt.ItemDataRole.DisplayRole)
-        widget.select_indices([i for i, layer in enumerate(layers) if layer in current_layers])
-
         return widget
 
     def setEditorData(self, editor: MultiSelectComboBox, index):
         data = index.data(QtCore.Qt.ItemDataRole.DisplayRole)
-        editor.select_indices([i for i, layer in enumerate(data) if layer in data])
+        layers = self.project_widget.draft_project["layers"]
+
+        editor.select_indices([i for i, layer in enumerate(layers) if layer.name in data])
 
     def setModelData(self, editor, model, index):
         data = editor.selected_items()
diff --git a/rascal2/widgets/project/models.py b/rascal2/widgets/project/models.py
index cad3320..78d7ded 100644
--- a/rascal2/widgets/project/models.py
+++ b/rascal2/widgets/project/models.py
@@ -54,6 +54,8 @@ def data(self, index, role=QtCore.Qt.ItemDataRole.DisplayRole):
             # pyqt can't automatically coerce enums to strings...
             if isinstance(data, Enum):
                 return str(data)
+            if isinstance(data, list):
+                return ", ".join(data)
             return data
         elif role == QtCore.Qt.ItemDataRole.CheckStateRole and self.index_header(index) == "fit":
             return QtCore.Qt.CheckState.Checked if data else QtCore.Qt.CheckState.Unchecked