Drupal automatically generated invalid url?

For exampleThe correct url is /NewsThe correct url is still there, but Drupal automatically generated invalid url likeNews/products/products/products/

For example
The correct url is /News

The correct url is still there, but Drupal automatically generated invalid url like
News/products/products/products/products/products/products

The are about 4000 invalid url invalid url automatically generated on my site

or:For exampleThe correct url is /NewsThe correct url is still there, but Drupal automatically generated invalid url likeNews/products/products/products/products/products/productsThe are about 4000 invalid url invalid url automatically generated on my site

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