Hello,

it is because of you are still using one and the same web-part. If you change some its property in one place, change takes effect in all of them (in fact there is no "all", there is only one web-part). To have several same web-parts with different parameters, use CLONED WEB-PART, please. You can clone web-part in Site Manager -> Developments -> Web parts.

Best regards,
Radek Macalik