To Reproduce:
1. Open attached Rainbow_Factory project
2. Open _Scene scene
3. Under COW object there's a cow object. Duplicate that cow object
4. Create animator controller for COW object
5. Add one of the cow's transform curve to COWs animator controller
6. Add the other cow's same transform curve to COWs animator controller
Expected results: A new cow transform curve appears
Actual results: there's only one cow transform curve

By design: Animation system does not support object that have exactly the same name and path. This is a known limitation and we dont expect to change that soon.