WordPress custom post type with custom taxonomy slug

I created custom post type with custom taxonomy. Its working, but i am facing one issue is

http://example.com/taxonomy-slug/%term%/post-title 

this is my custom post type url

exg:

http://example.com/products/cars/bmw-z4

Here

products -> taxonomy-slug

cars -> taxonomy-term

bmw-z4 -> product title

custom-post-type slug -> products/%custom_taxonomy%

this link is working, but also its working when i change taxonomy term value

Exg: http://example.com/products/crs/bmw-z4

This link also working even after changing(cars -> crs)/puting any value at that position. Actually it should be redirect to page not found page.