My VRC Avatar Descriptor is not showing the Playable Layers properly. Layers are missing/duplicated. Two FX layers.
If you do not have all five layers, your avatar FBX likely is not set to a humanoid rig. If you have duplicate layers like two FX layers, this is caused by having an avatar descriptor, and then re-configuring the rig on the main FBX.
Always configure your FBX rigs prior to setting up your avatar descriptor. If the avatar descriptor already has duplicated layers, click Reset Playable Layers and then Customize to reset it, then re-select each of the custom animator controllers you had previously.
Also check if you have Humanoid avatar must have head, hands, and feet bones mapped.