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When you say that "each one has it own canonical tag to its own individual page", do you mean that "./name-of-the-page-categoryone" has a canonical pointing back to "/name-of-the-page"? Are there other variations (sorts, filters, etc)? Typically, it's best not to have different categories land you on custom URLs with the same content. If, for example, a product appears in multiple categories, you should still land on one unified URL when you actual click to the product, regardless of the path/category used to get you there. That said, rel=canonical should work, and our tools should generally honor it. I have a feeling that there's something more complicated going on here.