Using Ditto, TagLinks and TagCloud i have two url for the same tag.

Practice examples from Modx Resources with tag: "
site template"
Ditto snippet tag link:
modxcms.com/resource-listing.html?tags=site
%20template
TagLinks and TagCloud snippet tag link:
modxcms.com/resource-listing.html&tags=site
+template
Two pages, with duplicated content

Bad thing for Google and Seo
Is there any way to have the same url?