I am going to guess that whoever is managing the alibaba page is combining manufacturers? Not all the models are manufactured by XINLING.

Model lines can be made to all look good combined, but in reality they are really detached suppliers. These are different companies that are in different parts of China. Xinling is in Jiangsu and Yinhe “Galaxy is in Guangdong?

They could combine and be in or manufacture in different cities and in that manufacture different product, then combine them into one brand to market and sell, but is that happening or just sharing a trading site? It is the same thing the later just not formal and would be more efficient, however just not very professional.