Higher level you manufacturing (collectives) all have the exact same name. Keeping the same image is fine... but it should have a numarl indicating which level the structure is.
Current scheme:
Tech 1: Yor Collective
Tech 2: Improved Collective
Tech 3: Improved Collective
Tech 4: Improved Collective
Suggested:
Tech 1: Yor Collective
Tech 2: Improved Collective
Tech 3: Advanced Collective
Tech 4: Supreme Collective