that's because snapback refers to your post number, and i believe post number is kinda tag with the topic number as well. what you can do is instead just change the snapback tag to a text and link it with the original post link. Check how I quote yours.

For every post in a topic, you should be able to see the Post #X on the right, where X denotes the post number. Click it and a dialog box should appear , which shows you the original post link, which you can paste to address bar.

Snapback is just a feature for people to refer back to the original post (sometimes you quote and realized it's too long, thus you deleted some lines, and instead ask people to click snapback to read the whole post that you quoted).