Problems with simple regex

I’m having some issues with a simple regex that I can’t find any answers to.

I am redirecting URLs from an old html site to product categories on my WordPress/WooCommerce site. The old URLs are complex and rather than redirect every product I am matching a partial URL to the top level category.

http://www.evatron.com/index-pag-products-cid-1-sid-1-l-2.html

Redirects to:

http://evatron.com/product-category/desk-consoles/

But I am only matching this part of the URL which references a product category number:

/index-pag-products-cid-1

Using this regex:

/index-pag-products-cid-1(.*)

Works lovely, until I get into double digits at the end of the original partial URL:

/index-pag-products-cid-11(.*)

Should go here:

http://evatron.com/product-category/rectangular-potting-boxes/

But ends up at the same URL as the first redirect:

http://evatron.com/product-category/desk-consoles/

Am I doing something wrong with my regex markup? I tried disabling the original
/index-pag-products-cid-1(.*) to test if then the double digit URLs worked, but it made no difference…

Any help would be much appreciated.

https://ww.wp.xz.cn/plugins/redirection/