Link in multiple posts and getting comments to work

I current have a blog that is not using post titles. Inside of each individual post there are links to category pages.

The problem is coming when I have the same link inside multiple posts and getting the comments to work.

To give you an idea my blog is currently setup like this:

Post #1 contains the link “(56543):” which goes to the URL mydomain.com/code-errors/56543

Post #4 also contains the link “(56543):” and goes to same URL above

So far so good, the problem is being able to leave comments for each individual post.

Example: (same as above but with comments)

Post #1 contains the link “(56543):” which goes to the URL mydomain.com/code-errors/56543
Leave a comment >> goes to URL mydomain.com/code-errors/56543#respond

Post #4 also contains the link “(56543):” and goes to same URL above
Leave a comment >> goes to URL mydomain.com/code-errors/56543-2#respond

So obviously with the -2 added it’s going to come up with a 404 error. How can I make it so my template will generate for the -2, -3, -4, etc URLs?