left baggage and lost baggage 的分別?

They are extremely not the same.

Left baggage - 存放行李
E.g. : I left my baggage to the hotel reception.
我將我的行李存放在酒店的詢問處。

Lost baggage - 遺失行李
E.g. : I lost my baggage at the hotel reception.
我在酒店的詢問處遺失了我的行李。