After test on localhost, it is yes that I need to uninstall the style first and do a fresh style install. Lol... And thanks for the update.
Edit: Btw is there has any way for me to do the style upgrade without have to uninstall the style first? Can I just upgrade by uploading the XML, Phrases, and Product file?
I asking this because I don't want the style ID get increasing when each time I do the delete and install the style again and again. I just want to stay using the same style ID.