It sounds like you created a Form XObject, which is a resource that can be shared amongst different pages. This is often ideal, as it reduces file size, but not ideal for your case.
Probably the best thing to do, since re-importing everytime would also duplicate things like font resources, is import the template once, and then use ElementEdit sample code to read from the template page, and write to the source page, changing whatever you want. This will create unique content streams, while sharing fonts, and any images.
To assist further we would need full code and input/output files.