Add a layer to a glyph (by hitting Copy on the palette)
Undo that layer addition (Cmd-Z or the menu)
Go to Edit menu.
The second item should say “Redo Add Layer.” Instead it says “Redo remove Layer.”
(Choosing the item actually does redo the adding of the layer as one would expect. So the behavior is fine, it’s just the wording of the menu item that’s off.)